work object in rqcreatelineapproval flow to trigger rqlineapproval

For the delivered flow of rqcreatelineapproval, there are several variables in the Variables tab within the WorkObject to rqlineapproval such as:
RL_COMPANY
RL_REQ_NUMBER
etc...

We're trying to implement the line level approval for requisitions, not header. So rqcreatelineapproval triggeres also the rqlineapproval flow and passes the variables to it.
We've got everything set up and running and when an order is created and released, the work unit error log is having trouble and problems resolving how the variables in the work object are set up:
String RLN_COMPANY=
String RLN_REQ_NUMBER=
etc...
..

RL is the query for reqline and it's trying to reference the COMPANY field from the query. But when we trigger a workunit with a new requisition, the work unit error log spits it out at exactly these variables. Here is a sample error message:

ErrorLog in Process : rqcreatelnapprv_V04 Workunit : 256, ActivityType=WO, Activ
Exception while evaluating expression: RLN_COMPANY = ;
illegally formed XML syntax (threadScript#1)
ErrorLog in Process : rqcreatelnapprv_V04 Workunit : 256, ActivityType=WO, Activ
Exception while evaluating expression: RLN_REQ_NUMBER = ;
illegally formed XML syntax (threadScript#1)
...
...

I have tried different variations using RLN_COMPANY=!RL-COMPANY and RLN_COMPANY=RL_COMPANY, but they all come back with the same error message.

This is pflow version 9.0.1.5 on Windows env 9.0.1.5

What am I missing here? What is the correct syntax to pass variables in the WorkObject node???? Is there a patch or newer version of the rqcreatelineapproval flow availbale?

Thanks in advance,
Roger