GetTableCellVal：“the index passed is out of range”

[Carot]

I creat a Table Control，some code in the callbacks of Timer Control like this：

==============================================

int a，b，i=1； 

GetNumTableRows (panelHandle, PANEL_TABLE, &a);

if (i<=a)

{

  GetTableCellVal (panelHandle, PANEL_TABLE, MakePoint(1,i), &b);

}

else i=1;

ComWrt (1, b, 1)

==============================================

When I debug the program, there was a mistake：

“ NON-FATAL RUN-TIME ERROR:   "7.c", line 346, col 21, thread id 0x000007F8:   Library function error (return value == -55 [0xffffffc9]). The index passed is out of range ”

How to solve this problem?

[Carot]

Additional information:

befoe this Table Control,I have a Button.Its function is as follows:

InsertTableRows (panelHandle, PANEL_TABLE, -1, 1, VAL_CELL_NUMERIC);

[Wolfgang]

1) which function call reports this error?

2) the function ComWrt is defined as follows: int ComWrt (int portNumber, char buffer[], size_t count); so your second parameter should be a string, not an integer