...please check the server log.
Default location: tomcat/work/Catalina/localhost/<app>/
The export processing seems to stumble somewhere.
Please note: By default the export processing tries to find the cell value by analyzing the GRIDCOL-<containedControl> construction: e.g. if it is GRIDCOL-LABEL then the LABEL-TEXT binding is used for finding the cell value.
If there is some complex construction within the Cell, for example...
Code:
GRIDCOL
PANE
ROW
LABEL
ROW
LABEL
...then you may support the finding of the value by defining GRIDCOL-SORTREFERENCE, which contains some binding to the cell data.
Example:
Code:
GRIDCOL SORTREFERENCE=".{someProperty}"
PANE
ROW
LABEL
ROW
LABEL
But: please check the log for dome stack traces...
Regards, Björn