Error SWF_BND_001 101 on event linkage

Hi

In SWEQADM I am getting the following error ...

Error processing following event linkage

CA_WRTOFF APPROVALREQUIRED

Following error occurred:

SWF_BND_001 101

&EVT_OBJECT.TCCLEARINGAMOUNT&

Error : Source (expression ‘&EVT_OBJECT.TCCLEARINGAMOUNT&’) of binding assignment is not available

In the event container EVT_OBJECT.TCCLEARINGAMOUNT is populated with a valid value.

When I manually redeliver the event it works fine.

Has anyone seen this error before?

Thanks

Pete