I'm creating a maintenance work-order system for a commercial property management company and need each work order to be sequentially numbered automatically upon opening. I've tried creating a field which ties to an original source document using the following:

{INCLUDETEXT "Drive:\\Filepath\\Filename.Extension"}
This simply inserts the entire original document into the field.

{INCLUDETEXT "Drive:\\Filepath\\Filename.Extension" \!}
This does the same as the above

and

{INCLUDETEXT "Drive:\\Filepath\\Filename.Extension" "bookmark name"}
This just shows a blank field with no data.

The field code that I have in the original document is: seq workorder \# 00# \r000501 \* MERGEFORMAT

What am I doing wrong here?