error while using DB2 EE stage

[gsym]

i got an error while running job, which has DB2 EE stage as the target

following are the errors got from log

step: Can not find db2node.cfg file. Please set APT_DB2INSTANCE_HOME
main_program: Could not check all operators because of previous error(s)
main_program: Creation of a step finished with status = FAILED.


Thank you . .

[Vidyut]

In Datastage Administrator go to properties of the project, now here in environment variables set APT_DB2INSTANCE_HOME = (path of your database installation for example /home/ibm/sqllib)