predict.correcttimesmearing not working without creating new MS

[henedler]

The correcttimesmearing option to upsample the uvw values in the DP3 predict step does not appear to work when not writing to a new MS:

DP3 msin=mss/TC03.MS pre.sourcedb=mss/TC03.MS/tgts-c0.skymodel msin.datacolumn = DATA pre.sources=source_3C295 msout.datacolumn=source_3C295 pre.correcttimesmearing=2 msout=. msout.datacolumn=MODEL_DATA steps=[pre] pre.type=predict pre.correctfreqsmearing=True

This leads to the following error:

 std exception detected: Update step msout. is not possible because meta data changes (by averaging, adding/removing stations, etc.
)

To me it looks like some issue from the internal upsampling and averaging.