Hi,
this is while an error rised up during the module migration step.
I've placed an error_log entry just in front of the call to method returnError showing the exception message which is:
[04-Apr-2014 18:32:15] Unknown column 'numnews' in 'field list' SQL=INSERT INTO jos_modules
(title
,content
,ordering
,position
,checked_out
,checked_out_time
,published
,module
,numnews
,access
,showtitle
,params
,iscore
,client_id
,control
) VALUES ('Main Menu','','7','position-7','0','0000-00-00 00:00:00','1','mod_mainmenu','0','0','0','menutype=mainmenu\nmenu_style=list\nstartLevel=0\nendLevel=0\nshowAllChildren=0\nwindow_open=\nshow_whitespace=0\ncache=0\ntag_id=\nclass_sfx=\nmoduleclass_sfx=_menu\nmaxdepth=10\nmenu_images=0\nmenu_images_align=0\nmenu_images_link=0\nexpand_menu=0\nactivate_parent=0\nfull_active_id=0\nindent_image=0\nindent_image1=\nindent_image2=\nindent_image3=\nindent_image4=\nindent_image5=\nindent_image6=\nspacer=\nend_spacer=\n\n','1','0','')
So jUpgrade seems to await the column numnews in table jos_modules which ist not present.
Best regards
level420