The main my blockdiagram is in following which maybe helpful: A table name, demonstrated to be valid,was transferred from upper procedure. It was connected to case select structure in that each column name can be drawn out as a parameter in select syntax. And each case structure is just to get column name.Certainly, the get column information vi is put in the case.
Those connection referrence is also from the upper vi. And the 4101 error also occurred even in the subVI request column information in get column information vi. No any referrence can be transferred to the next step. The connection and disconnection operations have be done right. Waiting for help! Thanks again.
