avoid exception when tmtbl.appConfig.pattern property is set wrong
avoid exception when tmtbl.appConfig.pattern property is set wrong

nikeshmhr/unitime,UniTime/unitime,sktoo/timetabling-system-,rafati/unitime,zuzanamullerova/unitime,UniTime/unitime,maciej-zygmunt/unitime,rafati/unitime,zuzanamullerova/unitime,sktoo/timetabling-system-,rafati/unitime,zuzanamullerova/unitime,maciej-zygmunt/unitime,sktoo/timetabling-system-,UniTime/unitime,maciej-zygmunt/unitime,nikeshmhr/unitime,nikeshmhr/unitime