Applies To:
  • CitectSCADA 5.xx
Summary:
A TagRead() may fail when used on variable tags being accessed with the OPC or DDE protocol drivers with the hardware error 259 'General' 'Array has been overrun'. 

Solution:
TagWrite() will fail when the tag has an '[' (open square bracket) followed by a non numeric character or '0' (zero) as part of the address. The DDE driver (that is both DDEDRV & DDEDRV2) and OPC entries in protdir.dbf need to have the OPTIONS field set to 0x0880CF. This is supported in the OPC V1.07.02.188 or later. 
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