How to troubleshoot oaforms/OC4J process in Oracle Application Release r12 ?

1)First check oacore startup log file .
$LOG_HOME/appl/admin/log/adoaformsctl.txt

2)Next check opmn log
$LOG_HOME/ora/10.1.3/opmn/opmn.log

3)$LOG_HOME/ora/10.1.3/opmn/oafm_default_group_1/formsstd.err

4)$LOG_HOME/ora/10.1.3/j2ee/oaforms_default_group_1/application.log