[Lazarus] Unit checksum changed error

[Sven Barth]

Am 17.01.2019 um 22:24 schrieb Thomas Crone via lazarus:
> 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?
As a first step you could try to add the -vu parameter so that the 
compiler prints which units it is indeed using, cause this error usually 
happens if it picks up a stray PPU (just had that situation as well ;) 
). In Lazarus you find this option in "Compiler Settings -> Verbosity".

Regards,
Sven