this bug 6014 was solved, added a way to validate if a file exist
this bug 6014 was solved, added a way to validate if a file exist

tomolimo/processmaker-server,colosa/processmaker,hitsumabushi/processmaker,baozhoutao/processmaker,tomolimo/processmaker-server,hitsumabushi/processmaker,colosa/processmaker,baozhoutao/processmaker,hitsumabushi/processmaker,hitsumabushi/processmaker,colosa/processmaker,colosa/processmaker,colosa/processmaker,colosa/processmaker,tomolimo/processmaker-server,tomolimo/processmaker-server,baozhoutao/processmaker,tomolimo/processmaker-server,hitsumabushi/processmaker,baozhoutao/processmaker,baozhoutao/processmaker,hitsumabushi/processmaker,baozhoutao/processmaker,tomolimo/processmaker-server