In normal use, the IWLD argument should be set to the value DAT__NOWLD before the first call to HDS_WILD. The value returned through this argument subsequently identifies the search context, which is retained between calls. In this way, several wild-card searches may be performed concurrently if required.
A call to HDS_EWILD should be made to annul the search context identifier when the search is complete. This will release any resources used.