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ANSI C Library Chapter 1
LabWindows/CVI Standard Libraries 1-8 © National Instruments Corporation
or by creating another .pif file. Refer to your Microsoft Windows documentation for help on
creating and editing .pif files.
If the function is passed a null pointer, LabWindows/CVI returns a non zero value if a command
processor is available. Under UNIX, if the argument is not a null pointer, the program returns a
zero. Under Microsoft Windows, if the argument is not a null pointer, the program returns zero
if the program was successfully started, otherwise it returns one of the following error codes.
-1 System was out of memory, executable file was corrupt, or relocations were invalid.
-3 File was not found.
-4 Path was not found.
-6 Attempt was made to dynamically link to a task, or there was a sharing or network
protection error.
-7 Library required separate data segments for each task.
-9 There was insufficient memory to start the application.
-11 Windows version was incorrect.
-12 Executable file was invalid. Either it was not a Windows application or there was an error
in the .EXE image.
-13 Application was designed for a different operating system.
-14 Application was designed for MS-DOS 4.0.
-15 Type of executable file was unknown.
-16 Attempt made to load a real-mode application (developed for an earlier Windows version.)
-17 Attempt was made to load a second instance of an executable file containing multiple data
segments that were not marked read-only.
-20 Attempt was made to load a compressed executable file. The file must be decompressed
before it can be loaded.
-21 Dynamic-link library (DLL) file was invalid. One of the DLLs required to run this
application was corrupt.
-22 Application requires Microsoft Windows 32-bit extensions.
-23 Could not find toolhelp.dll or toolhelp.dll is corrupted.
-24 Could not allocate a GetProcUserDefinedHandle.
The exit function does not actually flush and close the open streams. LabWindows/CVI leaves
files open so that they may be used from within the Interactive Window after execution of the
project terminates. The Close Libraries menu option under the Run menu performs this library
cleanup. This library cleanup is also performed when you restart execution of the project by
selecting Run Project from the Run menu. The argument passed to function exit is not used
by the LabWindows/CVI environment. Under UNIX, standalone executables created by
LabWindows/CVI return the value of the argument passed to the exit function.