There has been a long-time bug in DbExport when invoked from DbExplorer. The table argument, - t, is appended to the end of the command line arguments and when this exceeds 512 bytes it is truncated.

In DataFlex 18.0, at least, you might get an error depending on where the truncation occurred, continue and eventually allowed to select a table.

In DataFlex 19.0 this has regressed. The problem still exists but the wizard page to select a table is now empty.

Apart from fixing this for DataFlex 19.1 perhaps the interface between DbExplorer and DbExport could be improved. E.g. if the command line arguments would exceed 512 then drop the column select arguments, -n1 -n2 etc.