InfoPath Dev

I need concatenate the two string only one: concat("("; concat(substring("000"; 1; 3 - string-length(requestID)); requestID)) concat("v", concat(substring("00", 1, 2 - string-length(../my:requestVersion)), ../my:requestVersion), ")") The result should be: 000 v 00

 I'm afraid I don't understand the question. I would guess based on your desired outcome (replacing my fields w/ your fields, and I think based on language you need semicolons where the English version uses commas)

concat(substring("000", 1, 3 - string-length(my:field1)), my:field1, " v ", substring("00", 1, 2 - string-length(my:field2)), my:field2)

You are the best :) Thanks it's working :)