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What causes Concept error "Program data area too small"?

You can correct the  "877  PLC: Program data area too small" error in Concept by going offline and performing a Memory Prediction.

One or both of the following may  need to be increased.

The amount of IEC memory allocated in the PLC Selection screen may need to be increased.
The amount of Global Data allocated (default = 4) may need to be increased.
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