Error 1502

Question

While trying to build a previously build exe I get the following error.
Error 1502 occurred at AB_Source_VI.lvclass:Close_Reference.vi -> AB_Build.lvclassave.vi -> AB_Build.lvclass:Copy_Files.vi -> AB_Application.lvclass:Copy_Files.vi -> AB_EXE.lvclass:Copy_Files.vi -> AB_Build.lvclass:Build.vi -> AB_Application.lvclass:Build.vi -> AB_EXE.lvclass:Build.vi -> AB_Engine_Build.vi -> AB_Build_Invoke.vi -> AB_Build_Invoke.vi.ProxyCaller
Possible reason(s):
LabVIEW:  Cannot save a bad VI without its block diagram.
Solved!
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Answer 1

Hi!
First I have to thank you all for your comments and posts. I would not find a solution so quickly without this forum.
The same error (1502) occurred during the build process with an explanation: "Cannot save a bad VI without its block diagram.".
I read a few posts here on this forum and tried a few solutions.
I first check the VI "FP Initial View.vi" which was reported to be broken. It was not broken, of course.
Then I turned on debugging as suggested in the error message. This helped builder to finish its work but it did not remove (or hide) the error. When I ran the exe the top level VI showed its panel with broken arrow and a message window said something like : "The application can't start. A full development version of LabView is needed ... bla, bla ".
Next try: I disabled a part of so-called-broken VI with the Diagram Disable Structure. I disabled the part it changed after the previous working version. After a few minutes the builder reported the same error but it pointed to another VI: a small utility VI with Allow debugging option OFF and Inline subVI into calling VIs option ON.
Because I read a few comments about connecting constant to Case Structure I immediately changed the enumerated constant Interpolation method to a variable. I also removed Disable Structure from FP Initial View.vi and tried to rebuild the application.
It works now.
It's interesting that the solution  by fredb is seven years old but it still deserves a kudos.
I'm using LabView Developer Suite, version 13.0f2 (32 bit) on Windows 7 Professional, SP 1, 64 bit.
Regards and thanks again.