[Qgis-developer] No vector output with GRASS Processing

[matteo]

Hi all,
I ran random Grass 6 command with Processing but they always failed, and 
that the final part Processing algorithm log:



GRASS_INFO_ERROR(21268,1): Vector map not found
GRASS_INFO_END(21268,1)
Closing monitors ...
Cleaning up temporary files ...
Batch job '/home/matteo/.qgis2//processing/grass_batch_job.sh' (defined 
in GRASS_BATCH_JOB variable) was executed.
Goodbye from GRASS GIS
Converting outputs
Caricamento layer

The following layers were not correctly generated.
3D vector
You can check the log messages to find more information about the 
execution of the algorithm



Some hints?

Should I open a ticket?

Thanks

Matteo