Hello, What service pack do you have installed for Data Reviewer? There was a fix in Data Reviewer's 10.0 SP1 that addressed an issue with the Polygon Grid Wizard, which might be related to what you are experiencing. Since you have core's SP4 installed, you would need DR's SP4. Note that the latest Data Reviewer service pack and patch is SP5 Patch 2, which requires Core's SP5.
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