Work Flow Stuck - Trying to Invoice

 Hello,

    We have implemented Oracle Apps 11.5.10.2.   We are having serious issues with orders being stuck and not invoicing,  we think in the workflow process.

    We have shipped the orders, but we can not invoice them.  This is not happening to all the orders ,  but several it is.

    The Header workflow step is at  Waiting for line fullfillment.   The Lines are all Fullfilled.

     I hope this makes sense.

    I had a similar in the  Core Workflow chat room,  that gives more detail.

  Also,

    can anyone tell me what schema to find the workflow tables under.  I found some under the applsys schema,  but i didnot see anything that references  orders.