Sting parameter length limit?

Does anyone know if there is a length(charactor) limit to a string parameter? We have some parts that get notched at various places and I'm trying to drive the part descreption with relations so they dont have to be entered manually every time.

My relations end up looking like this to drive the parameter.

PART_DESC1 = "S " + LEG_LENGTH1 + " | N " + ARC_LENGTH + " | S " + SIDE_LENGTH + " | N " + ARC_LENGTH + " | S " + BASE_LENGTH

PART_DESC2 = " | N " + ARC_LENGTH + " | S " + SIDE_LENGTH + " | N " + ARC_LENGTH + " | S" + LEG_LENGTH1

PART_DESC = PART_DESC1 + PART_DESC2

I had to use 2 parameters because the relations won't except a single equation long enough to populate the entire description.

This is what the the final value for PART_DESC should be

S 23 11/16 | N 7 1/16 | S 80 5/8 | N 7 1/16 | S 66 1/8 | N 7 1/16 | S 80 5/8 | N 7 1/16 | S23 11/16

but all I get is this

S 23 11/16 | N 7 1/16 | S 80 5/8 | N 7 1/16 | S 66 1/8 | N 7 1/16 | S 80 5/8 | N

Its cutting off the end so I'm wondering if there is a length limet to the string parameter. I haven't been able to find anything specifying a limit.

I know I could remove some spaces, but I'm hoping I won't have to do that.

Any help is appreciated.