Applies To:
  • CitectSCADA 1.10, 1.11, 2.00

ComRead and ComWrite have a maximum buffer size of 128 characters. If you specified a buffer larger than 128 characters Citect may generate a General Protection fault. 

Version 1.20 and 2.01 and later now check for a maximum of 128 characters in the buffer length. If you try to write more than 128 characters, ComWrite will return a range error. If you try to read more than 128 characters, ComRead will not generate an error message, however it will only return 128 characters. This allows your existing Cicode to run correctly.