[Qgis-developer] Problem with GRASS 7 and Processing

[matteo]

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HI all,
QGIS fresh compiled and Grass7 installed (works as standalone).
I'm not able to run any of GRASS7 algorithm with Processing, this is
the error:

2015-10-01T09:34:21	2	Could not load model model_PCA.model
			Error in algorithm name: r:acpcercle
2015-10-01T09:34:30	2	Uncaught error while executing algorithm
			Traceback (most recent call last):
			Traceback (most recent call last):|  File
"/home/ma7730/.qgis2/python/plugins/processing/core/GeoAlgorithm.py",
line 227, in execute|    self.processAlgorithm(progress)|  File
"/home/ma7730/.qgis2/python/plugins/processing/algs/grass7/Grass7Algorit
hm.py",
line 425, in processAlgorithm|    Grass7Utils.executeGrass7(commands,
progress, outputCommands)|  File
"/home/ma7730/.qgis2/python/plugins/processing/algs/grass7/Grass7Utils.p
y",
line 270, in executeGrass7|    command, grassenv =
Grass7Utils.prepareGrass7Execution(commands)|  File
"/home/ma7730/.qgis2/python/plugins/processing/algs/grass7/Grass7Utils.p
y",
line 252, in prepareGrass7Execution|    del env['GISBASE']|KeyError:
'GISBASE'|
2015-10-01T09:34:30	1	There were errors executing the algorithm.


Any idea?

Thanks!

Matteo
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