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This page was last updated:  01/02/07
 

PC Software

I downloaded the software but cannot find it on my PC.
I just downloaded a flight log and the date is stated as 1936.
My Toshiba Portege 3110CT laptop will not communicate with the GPS-NAV. My Dell Inspiron 5000, PIII, Win 98 laptop will not run CAI 5.882, help?
Please provide detailed instructions for installing the PC Software on my PC.
When I attempt to transfer flight logs from my FR, I get a message "unable to register graphic fonts". What is the problem?
I have just  downloaded a turn point file, how do I display an overhead view?
I have downloaded a Turnpoint Database from the Internet, how do I load it into my Flight Recorder?
When I view a flight on my laptop computer the image doesn't fill the screen, why?
Why am I finding task declarations in files which were not declared.....?
I would like to print my flight using my color printer, how is this accomplished?
I have downloaded some flights via the Internet but cannot view them, what is wrong?
Why do I  get a "Run Time Error" message while trying to install the GPS PC Software?
I get a message stating "not enough space for environment" when I try to run the GPS PC Software, why?
Why do I get a "divide by zero" error message when trying to run the GPS PC Software?
Can you clarify some questions regarding the GPS PC Software?
Will my Cambridge Aero products continue to function correctly in the Year 2000?


I downloaded the software but cannot find it on my PC.

One of our customers had this problem and solved it as follows. 

"I got to thinking there might be some program or function on my PC that could be deleting this file after it had completed downloading. This led me to suspect that my McAfee VShield virus scan program might be the culprit. I found that the downloaded file was listed by VShield as the "last downloaded file checked" even though the file was by that time nowhere to be found.

I then got a successful download as soon as I turned off the "downloaded file virus check" function in the VShield program. So, it seems that for some reason, VShield deleted the file immediately after it had checked it at the end of the download. Now, if Virus Shield thought your code contained a virus and decided to immediately delete the file, it should have told me that it had done so. But it didn't!

After I did download the file successfully, I did a virus scan on it using the same VShield program. No viruses were reported, so I'm still mystified by the fact that VShield was deleting the file after checking it at the conclusion of the download".


I just downloaded a flight log and the year  is stated as 1936.

This happens when you download a flight log recorder in the year 2000 using V5.6 of the PC Software. This will be corrected when you upgrade to V5.882. Before you upgrade to V5.882, delete the flight files from your PC using the PC Software. This is accomplished by making the following selections:

Flight Logs/Delete Unwanted Flight Log Files/Select from all Flights/Arrow key to highlight/Space key to Select/Enter key delete selected files/Abandon or Delete all marked log files (select Delete).

Once this is accomplished download the PC Software (found on the Software page) and install it on your PC.


My Toshiba Portege 3110CT laptop will not communicate with the GPS-NAV. I try to transfer flight logs and it remains on Status: "Attempting connection" for ever. Please can you suggest anything or help?

It appears that Win98 powersave deactivates the COM1 port when going into MSDOS mode. This cannot be reactivated by MSDOS software. As a work around Toshiba suggested deactivating the PC's COM port power management in the registry. I've done the regedit and everything is now fine. Details may be found in Toshiba bulletin GRL-0002, 01/2000.

 My Dell Inspiron 5000, PIII, Win 98 laptop will not transfer flight logs to or from the data logger. No problem with opening the program. All other functions are fine, including export. Logger connects without problem to my home computer. Have checked all the usual things like com port, power cable (it works fine with the other computer), logger #. I have spent hours on the phone with Dell, even re-installed operating system. Tried copying the "transfer" file which works just fine in the home computer to the laptop CAI folder and it won't run on the laptop!! Any ideas?

It appears the problem is Windows 98 SE (second edition). Try going into: My Computer/ Control Panel/ System/ Device Manager/ Ports (COM & LPT)/ and delete the com ports. Then reboot the computer and let Windows find the ports again.. You may have a port with two copies on file.


I have downloaded the PC Software from your website, how do I install it on my computer?

To accomplish the following instructions you should be familiar with the Window Explorer function provided with the Windows operating system. You will use Windows Explorer to do the following.

1st step - create a new directory titled "tempcai" on your C: drive.

2nd step - copy the cai5882E.exe into the new directory you made in step one.

3rd step - double click on the cai5882E.exe file. It will extract out the files it needs for installation. A file will appear that is titled "readme". This file contains information regarding the installation.

4th step - double click on the install.exe file.

5th step - It will ask you for the directory name to install to. Press the enter key to accept the default directory. This will install the all of the files and folders associated with the PC software into the directory titled cai. 

6th step - Find the file with the name "GPS" and the file type "MS-DOS Batch File" and right click on it. Choose the option "create shortcut". Now right click on the file named "Shortcut to GPS" and select "cut". Close Windows Explorer. Minimize or close any other programs that you may have running so that all that is visible is the desk top (the default screen you see when you turn on your computer). Place the mouse pointer anywhere on an open area of the desktop and right click the mouse. Select "paste". This now places what is called a "short cut" to the PC Software on your desktop so that all you need to do to run the program is double click on the short cut icon.


When I attempt to transfer flight logs from my flight recorder I get a message, "unable to register graphic fonts". What is the problem?

This is likely due to insufficient DOS memory. Check the amount of free memory, and try to ensure that it is at least, say, 540K.


I have just  downloaded a turn point file, how do I display an overhead view?

What you need to do is to go to:
'single flight'
then select from all flights
Then select any flight
Then go to 'choose a different pc database'
Select the one you want to view
Then go to 'assigned task and navpoints from pc database'
Then go to 'Options'
Then to 'Display options'
Then to 'View control'
Then select 'View all navpoints'
Then Exit back to the 'flight display screen'
Now when you choose 'Overhead View' you will see your database


I have downloaded a Turnpoint Database from the Internet, how do I load it into my Flight Recorder?

Download the list of navpoints in .CAI file format.
Copy the file to your C:\cai\data\ directory and give it the extension .dat, in other words,  if you have a file titled uvalde.txt then you would copy the file to your C:\cai\data\ folder and call it uvalde.dat

Once you have accomplished this then start the GPS-NAV Software (go to C:\cai and type GPS). You must have your GPS-NAV connected to your computer via the serial data port.

Go to PC Databases.
Then go to Soaring Sites.
Then ADD a soaring site.
Give it a name and enter through all the other fields until you see POST at the top of the screen. (Post just means 'save changes').
Now you have a new soaring site with no navpoints.
Now choose Exit.
Now go to Special Functions.
Now choose Import.
Now choose Navpoint Export File.
Now type in the full path and filename, C:\cai\data\uvalde.dat and press Enter.
Select Import All Navpoints.
Now it should tell you how many navpoints there are.
Select Import XXX navpoints.
It should tell you XXX navpoints were imported. Press any key.
You should now have all the turnpoints added to your soaring site.


When I view a flight on my laptop computer the image doesn't fill the screen, why?

The GPS-NAV PC Software is written in DOS for VGA display (640 x 480 pixels). When the software runs on a desktop PC, the monitor automatically converts the 640 x 480 image so it fills the whole screen. This is true even if the desktop is configured for SVGA (800 x 600 pixels) or XGA (1024 x 780 pixels).

Laptop LCD screens have actual pixels rather than an electron beam scanning an array of phosphors. Showing a 640 x 480 image full size on a 800 x 600 pixel display requires logic to interpret the image an make decisions about which pixels to turn on.

Laptop manufacturers use Video Cards from different vendors. Display of 640 x 480 images on SVGA or XGA LCD screens is a function of the video card, not the laptop itself.

It is simplest to continue using the small VGA image on your new XGA laptop. If you want the larger image, the best place to start is by browsing the web.

Find the web site for the PC manufacturer and browse for video card updates or patches. Make sure to use only a patch for the specific video card in your laptop.


Why am I finding task declarations in files which were not declared and how can I edit the file to remove the declaration?

A flight declaration can be made from the GPS-NAV display or from the PC software. The usual method is from the GPS-NAV display. A PC task with code "A" will be sent to the GPS-NAV during database transfer. This permits a declared flight to be made without need for a GPS-NAV navigation display.

Our primary goal in defining how declarations work in the GPS-NAV was to preserve a valid declaration with its associated secure flight log. The GPS-NAV keeps only one flight declaration; it is transferred with every flight log. The declaration contains its own date and time. This can be used to determine if the declaration applies to the flight in question.

The only way to remove a declaration from the GPS-NAV is to transfer a new database into it.

A declared task stays in the GPS-NAV until another task is declared. Any flight that is transferred from the GPS-NAV to a PC will contain the Declaration.

If you do not want to see an inappropriate declaration with each flight, view the flight with the database from the PC rather than the flight log. The PREFERENCES menu lets you highlight this database source by default.

If you do not have the appropriate database in your PC, you can import it from the flight log itself.


I would like to print my flight using my color printer, how is this accomplished?

Here is how to capture screen images for color printing (you must be running MS Word 7):

  1. [Alt]+[PrtSc] to capture the image. The screen should blink during capture.
  2. [Alt]+[Tab] to switch between CAI PC Software and Word 7.
  3. [Ctrl]+[V] to paste the image in the Word document.

I have downloaded some flights via the Internet but cannot view them, what is wrong?

Check the name of the directory (or directories in the path) that the flights have been saved to. As the PC software is DOS based, it will not recognize file or directory names that contain more than eight characters. If this is the case, just rename the directories or move the files to a valid DOS folder.


Why do I  get a "Run Time Error" message while trying to install the GPS PC Software?

One possible reason is that you are trying to install the software into a directory that does not meet the DOS naming convention of eight characters or less. During the installation, the program will create a directory on your C: drive titled cai. It is in your best interest to allow this to happen. If you must install it in another directory, make sure the name of the directory is eight characters or less. Also, to make life easier on yourself, make sure the directory that contains the PC Software resides in the root directory  C:\cai   not as a folder within a folder in the root directory C:\soaring\programs\cai.


I get a message stating "not enough space for environment" when I try to run the GPS PC Software, why?

Version 5.2 of our GPS Software was about 30K larger than our previous version (3.1.1). The error message indicates that there is not enough memory in the MS-DOS environment to run the program. This does not refer to your 8MB of ram or your hard disk memory, but to the available memory in DOS to "run" the program. You are probably using a lot of card drivers (TSRs) in your laptop. If you can spare one of these you should be able to free up the additional memory needed. Our new V5.8 PC Software requires less memory to run and should take of this problem.


I recently purchased a new computer with a 200Mhz Cyrix microprocessor. When I try to run the GPS PC Software I get a message stating "divide by zero error", help?

This problem is due to the internal architecture of the microprocessor. The microprocessors exhibiting this condition are the AMD K-5 and K-6 family, and the Cyrix 6X86 family.

There are two choices available to correct this situation. First, reload the GPS-NAV PC Software (V5.2) using "instfast" instead of "install". At the DOS prompt type gpsfast instead of gps. This will run a file called "pipeloop" which will solve your problem with the Cyrix microprocessor.

The latest version of the PC Software, V5.8, has corrected this problem with the AMD as well as the Cyrix microprocessors.


Can you clarify some questions regarding the GPS PC Software?

Q. What assigns the date of a Flight Log, the flight Recorder or the laptop?

A. The answer depends on the source for display of Flight Log Navigation Point data.

IGC Flight log filenames come from the GPS clock which is based on UTC time. The first GPS fix in the flight log is the source of time and date information for filename assignment.

Day ---- 10th - a ------------------l
Month ---- June  6  ------------l l
Year -- 98 ---------------------- | | l
                                      | | |
                                     86ac0rw1.cai
                                           |   |  l
Manufacturer (Cambridge)------|   |  l
FR Identifier 0rw -----------------------l  l
Flight Number ---- 1 ---------------------l

Month and day are encoded as follows:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 -- --
1 2 3 4 5 6 7 8 9 a b c d e f - -

A local time offset is associated with the PC Software database for navigation points. Barograph traces, "fix" times, and flight evaluation times are all displayed in local time.

In California, the local time offset should be -7. UTC-PDT = 7. California time is 7 hours BEHIND time in Greenwich, England (the reference location for UTC).

This works fine except in New Zealand where the local time offset is +13 hours. If the first fix in a GPS flight is later than 1 PM local time, the UTC date is the next day! This caused problems at the New Zealand World Championships.

Beginning with PC software Version 5.2, flight log listings and all displays are based on Local time as controlled in the 2 - SOARING SITES database.

If a flight in California used +7 rather than -7 for the local time offset, then flight log selection and display which relates to date may not work properly. The Task used in 2 - MULTIPLE FLIGHTS is only valid for one day. Therefore, incorrect local time offset may cause failure of some flights to
be displayed.

If the flight log is displayed with database information from the flight log rather than the PC database, then the local time offset will from the 2 -SOARING SITES database of the PC that loaded data into the Flight Recorder. This may not be the same as the local time offset in the 2 - SOARING SITES database of the flight display PC.

Q. Must I create a separate task for each class?

A. Tasks are organized by CODE in the 4 - TASKS FOR THE SITE. Contests typically have different tasks for different glider classes (15 meter, Standard, Open, etc.) at the contest. The PC software allows entry of different tasks for different classes. This makes competition scoring much
easier and faster.

If the CODE field of a TASK is left blank, that task applies to ALL flights for that date.

If a task has CODE A through J assigned, that task will be sent to the GPS-NAV together with the Navpoint database. However, tasks with CODE letters A-J cannot be used for PC task evaluation. To use the task, clear the letter CODE an make sure task and flight date agree.

Q. Does the date of the flight log have to agree with the date of the task?

A. Yes, the LOCAL date of Task and flight log must agree for the flight to be displayed with task turnponts shown.

Q. Why do some traces appear to have no data (data in gray) when viewed as a multiple flight?

A. Flight evaluation requires that the pilot get "near" the start point and turnpoints. Otherwise, the program does not know when to move the evaluation to the next leg of the task. Incomplete evaluations are shown in gray.

Q. Why does the multi-flight not run if all the entrants do not have data?

A. The first flight in the flight log list must have a class as well as a date match with the task. Otherwise, the software does not know how to choose an appropriate task. The safest way to assure this is to use leave the CODE field blank. This assures that ANY glider flight for that day will
call up the appropriate task.


Will my Cambridge Aero Products continue to function correctly in the year 2000?

Below are listed the products with comments as related to the Y2K issue.

M-NAV: Non issue.
S-NAV: Non issue.
L-NAV: Non issue.
CAV: Non issue.

GPS-NAV PC Software: The Y2K bug has been corrected in Version 5.882.  

GPS-NAV:  The release of V5.4 for the Flight Recorder has a fix for a leap year bug that was discovered during our Y2K investigation. During our  investigation no Y2K problems were found. However, we did find that if a flight log is being recorded at midnight UTC, December 31 at the beginning or end of a leap year, the flight log is divided into two parts.

The GPS receivers contained within the Models 10, 20, and 25 is supplied by Garmin International. Please read the Garmin Y2K Statement on their website.

 During the end of week event (EOW) in August some GPS-NAV Model 10s experienced problems with satellite acquisition due to the old eight channel receivers. Garmin states that they no longer support the old eight channel receiver (GPS-10). After the event, we were able to write some code that enabled the GPS-10 receivers to "wake up". We were not able to anticipate (simulate) the EOW event as we have no control over the data that is received by the GPS-NAV from the satellites. We do not know what will happen at the rollover to the year 2000 with regard to the GPS-10 receivers. Garmin states that there should not be a problem. If there is, Cambridge Aero will make every attempt to correct the problem. Worst case is that the Model 10 will need an upgrade to the current GPS-25 receiver. This hardware upgrade will not be considered a warranty issue.


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