Error in <TCling::RegisterModule>: cannot find dictionary module xxx_rdict.pcm

[jrblaum]

Hello,

I am using ROOT 6.18/00, and although I have placed the path to the “.pcm” file in LD_LIBRARY_PATH and have checked that the “.so” and “.rootmap” files are in the same directory, I am getting the following runtime error:

Error in <TCling::RegisterModule>: cannot find dictionary module xxx_rdict.pcm

Please help!

Cheers,
Jackie

[eguiraud]

Hi @jrblaum,
and welcome to the ROOT forum!

This being an issue with ROOT modules, I think @vvassilev or @Axel are our best bet.

Cheers,
Enrico

EDIT:
it would probably help a lot if you could provide a minimal reproducer or a step-by-step recipe to reproduce the problem on our side.

[eguiraud]

(does this other post help?)

[vvassilev]

Can you tell us what is the name of the library? Maybe the names of the rdict and the library name mismatch?

[jrblaum]

Sure, the names are libVAMaximumLikelihood.so and libVAMaximumLikelihood_rdict.pcm. I should also point out that I was not having this problem using an older version of ROOT (6.10/08), and I’m using CMake 3.16.2.

[vvassilev]

The recent versions of ROOT enforced more consistency as rdict.pcm files could be picked up from the wrong places.

Could you run your failing example with ROOTDEBUG=8 env variable and attach the log?

[jrblaum]

logRootDebug8_pcmError.txt (1.2 MB)

[vvassilev]

Thanks!

Did you forward the stderr to stdout?

Looks like ROOT crashed just before issuing the error you saw the first time.