Design app error message

Dear All, I am developing program using Design application and each time I try to run I receive following error. _ _ Error: File: Shell_N_Tube_App.mlapp Line: 351 Column: 5 Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.__

Anyone can help?

[OCDER]

Copy and paste Line 351, including maybe 10+ lines before it so that we know the context of this code.