Forum Post: RE: Calibre / PEX / During Calibre view creation / *Error* close: argument #1 should be an I/O port (type template = "p") - nil

Hi Sunwoo The error message is saying that the input to the "close" SKILL should be a file handle. "p" refers to the input data type. In this case, it means "I/O port" type. As Calibre is a tool from Mentor Graphics, would you please get more help from Mentor's forum? Best regards Quek