In addition, the content of "parser.log" file with and without the modification _With modification_ : galaxy.web.framework ERROR 2014-04-30 14:11:52,222 Uncaught exception in exposed API method: Traceback (most recent call last): File "/w/galaxy/galaxy4kevin/galaxy-dist/lib/galaxy/web/framework/__init__.py", line 199, in decorator rval = func( self, trans, *args, **kwargs) File "/w/galaxy/galaxy4kevin/galaxy-dist/lib/galaxy/webapps/galaxy/api/permissions.py", line 50, in create *item = library.to_dict( view='element', value_mapper={ 'id' : trans.security.encode_id , 'root_folder_id' : trans.security.encode_id } )* File "/w/galaxy/galaxy4kevin/galaxy-dist/lib/galaxy/model/__init__.py", line 1960, in to_dict rval[ 'root_folder_id' ] = 'F' + rval[ 'root_folder_id' ] TypeError: cannot concatenate 'str' and 'int' objects _Without modification_ : galaxy.web.framework ERROR 2014-04-30 14:16:56,853 Uncaught exception in exposed API method: Traceback (most recent call last): File "/w/galaxy/galaxy4kevin/galaxy-dist/lib/galaxy/web/framework/__init__.py", line 199, in decorator rval = func( self, trans, *args, **kwargs) File "/w/galaxy/galaxy4kevin/galaxy-dist/lib/galaxy/webapps/galaxy/api/permissions.py", line 50, in create *item = library.to_dict( view='element' )** * File "/w/galaxy/galaxy4kevin/galaxy-dist/lib/galaxy/model/__init__.py", line 1960, in to_dict rval[ 'root_folder_id' ] = 'F' + rval[ 'root_folder_id' ] TypeError: cannot concatenate 'str' and 'int' objects Kevin MURET Intern at Station Biologique de Roscoff ABiMS platform