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Error: PrjData.dll not found. Projection and datum transforms may not operate correctly

Error Message

Starting ArcPad 7.1 may result in the following ArcPad warning message:

"C:\Program Files\ArcPad 7.0\System\PrjData.dll not found.
Projection and datum transforms may not operate correctly".
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Cause

The uninstallation process does not remove 7.0.1 version of ArcPadPrefs.apx from My Documents on Desktop PC installations. Thus, ArcPad still searches for System folder in C:\Program Files\ArcPad 7.0\System path.

Solution or Workaround

There are two possible workarounds that resolve this error:

  • Modify the System Files Path in the ArcPad Options > Paths dialog box to display C:\Program Files\ArcPad 7.1\System (Tools > Options > Paths > System Files Path).
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  • Delete the ArcPadPrefs.apx in My Documents before opening ArcPad 7.1 for the first time.