Object FORM method HTMLPROCESS cannot be executed

[Cristiana D'Agosto]

G'day all,
 
we are in version 4.6C and using ESS.
 
An employee is allowed to Delete their own leave; when that happens, the
Approval for Leave Delete Request workflow starts.
 
Everything was working fine; one of the consultants made a modification in
this workflow and now when the approver attempts to executes the work item
, the message Work item 000003646541: Object FORM method HTMLPROCESS
cannot be executed".
 
The Task for approval executes FORM.HTMLPROCESS
 
All the other workflows we have are working fine and are using
FORM.HTMLPROCESS
 
Any ideas? I am sure it is something small but I can't see it!
 
Many thanks and regards
 
Cristiana