Bursting file not accepting different number of copies in single run

Hi ,

I am setting the number of copies in a bursting dynamically. But once the parameter is set it is not getting reset for the next g_invoice_grp run.
${CP_NUMBER_OF_COPIES} variable  changes for every pdf gerenated for different customer. That is copies are set at customer level as a dff and I need to pass no of copies
for every single customer. Please give your valuable suggestions. The value in xml is resetting for CP_NUMBER_OF_COPIES for every G_INVOICE_GRP group. I can see this in xml .

<xapi:requestset xmlns:xapi="http://xmlns.oracle.com/oxp/xapi