If it’s a repeating field (check if the data contains a tilda ‘~’) setup an iterate over the field.
iterate 1(0).1(0).0(0).ORC.00219 %f1
if 1(0).1(0).0(0).ORC.00219(%f1) eq =STRING
You could also cheat and force it to grab the first iteration using
if 1(0).1(0).0(0).ORC.00219(0) eq =STRING
If it’s just a sub-component do as Sam suggested.
Jonathan