I built ArduPlane 2.50 on my desktop successfully running Windows Vista. When I moved it to my laptop running Windows 7 (64 bit OS), it fails to build. Just to make sure I didn't do anything in the transfer, I put the Arduino 1.0.1 and ArduPlane 2.50 on my USB drive and built it from there. Success on Vista, Failure on Windows 7.
I don't know that it has anything to do with the OS, but I don't know what else might be different. Maybe someone else has had this problem and found the fix?
Are you sure the Arduino config file (that tells it where to look for the libraries) is on the USB? Check the config menu to see if it's pointing to the right library folders.
Yes, that's it. As you can see, it's not pointing to your USB drive.
Do you mean that the sketchbook location is not the USB drive?
The location c:\users\bill\documents\arduino is also not where the libraries are.
They are at C:\Users\Bill\Desktop\RC_Stuff\arduino-2.5.
It works now. I forgot about the "change, exit and restart" required for Arduino. After making the change to d:\Arduino-2.5 (where the Arduino.exe is on the USB drive), now it works. I guess you just have to be on the correct drive, not the correct directory as shown by my preferences above.