Extracting data from drawing name in forms

[ptc-2601364]

Hello, I am creating a drawing form for a company. The drawing name, file name, has the syntax RT345891. I want to rewrite this in the drawing to 4-345.891. In the form I have the parameter &dwg_name which writes the file name RT345891 in the drawing. My idea was to use the function: partofmydrawingnumber = extract(&dwg_name,3,3) to create the new string in a repeat region as a relation. But the parameter &dwg_name is not recognised in the relation as an parameter, it creates an error message. Do anyone know how I can use the &dwg_name, another name for the file name parameter or any other get around? What is the syntax to create these parameters in the form but have them echoed in the drawing?
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[DavidButz]

I think you need to get the "&" out of your extract function; the & is a special character for printing a value in tables and notes, but the parameter name itself is just dwg_name.

[ptc-2601364]

I did not succeed. I cannot find a parameter with the models name, file name, thet can be used in a relation in the form. I believe this is because the form cannot see any model. So I created a parameter and a relation in the part instead. Something I did not want to do, as I do not want relations in the start part...

[DavidButz]

I'm not sure exactly what you are trying to do, but you can write a relation in the drawing to extract the model name as a starting point. Try "NAME=rel_model_name()". "[/b]&NAME "in the drawing will now show the source model name.

[DavidButz]

Then, of course, you can operate on your new parameter "NAME". Assuming from your example that you just arbitrarily add the "4-" at the beginning of the new parameter you are trying to create (I don't know where that comes from), you would then create another parameter something like this: X=extract(NAME,3,3) Y=extract(NAME,6,3) NEW_DWG_NAME="4-"+X+"."+Y

[DavidButz]

Ignore that stray "[b]" in the post before last.