EnsLib.HL7.Message.cls provides many API methods for manipulating an HL7 message.  RemoveSegmentAt(), for example, can be used to remove a segment by path or index, but only one segment at a time.   There may be times that you'll need to remove all segments within a group or even many groups of segments from the HL7 message.  Surely you can iterate through each segment in each group and remove them one by one, but there's a much easier way. 

With just one command, like below, you can remove all OBX segments in an ORU_R01 message (msg):

Set tSC =