[Lazarus] Unit checksum changed error

[Thomas Crone]

I have 3 run time units.
IOBuf, AIFF which 'uses' IOBuf, and PlayMusic which 'uses’ both IOBuf and AIFF

The compiele time for IOBuf.o, .ppu is 1:52 PM, for AIFF.om .ppu is 1:56 PM, using IOBu from 1:52 PM

Compiling PlayMusic gives an error message:
   Warning: Recompiling Aiff, checksum changed for IOBuf
   Playmusic.pas(56,25) Fatal: Cannot find Aiff used by PlayMusic of the Project Insplector.

It sounds like it is finding a different checksum on the IOBuf that PlayMusic is using than on the IOBuf that AIFF used.

Am I miss interpreting the error message?

How do I tell it where to find the AIFF source so it can re-compile it?

Tom Crone