Problems with String Concatenation

Problems with String Concatenation

I am trying to combine two strings.  Let's call them <path> and <filename>.  The result of this field points me to the path and filename of an important image asset.

I have successfully implemented the input.<path> + " " + input.<filename> into my field.  My problem is that a space is placed between the two strings, which then mucks up the function which does the lookup.

I tried using + with no quotes, and this did not fix my problem.

Any help?