I followed the steps as recommended below and it resolved my error. I just unchecked the box to make the field ST_LENGTH(SHAPE) not visible. I also made other fields that were not edited by the field crew not visible which cut down on the length of the forms in ArcPad also. It is a problem with PostGres. The field ST_LENGTH(SHAPE) is not null, but ArcPad is not able to write values in it. When you set the field properties of ST_LENGTH(SHAPE) in ArcGIS to not visible and GetDataForArcpad with the option 'Only get fields specified as visible in layer's properties', the field will not be in the axf-file. So: no field-no missing value-no problem When you checkout data on a customized way: ArcPadExchangeLib.IGetDataForArcPadUIDefaults3.VisibleFieldsOnly = true; Thanks for posting!
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