cRIO says: FRC_UserProgram failed to load.

[Larry R]

It WAS missing. But we added the -mlongcall flag using the instructions given in another post and still have the problem.

We did this....
"In Workbench IDE, right click on the project in project explorer on the left. Select "Properties". In the project properties dialog, click build properties on the left and click the "Build Macros" tab on the right. Make sure your Active Build Spec is "PPC603gnu". Select the "CC_ARCH_SPEC" name and click the Edit... button. If the "-mlongcall" option is not there, append it to the end. Save it and recompile."

....then CTRL-B to build and then Deploy. Same result. "No Robot Code" on the Driver Station display and the same error on the cRIO. We also deleted the make file and did a build to create a new one thinking maybe the make file wasn't updated. Still have the problem. When we go back to check the flags under CC_ARCH_SPEC, -mlongcall is there.