Getting errors while merging and attaching partitions

Hi,

I am trying to merge and attach the partitions for an E table of a cube.

While performing the merge, getting the below error.

"ORA-14097: Column type or size mismatch in ALTER TABLE EXCHANGE PARTITION"

While performing the partition attach, getting the below error.

"Error in BW: APP_NEW_PART_EFACT".

Can anyone let me know the cause and the solution for this.