From the screen shots you provided it is not possible to see the dimensions of either the source or target modules.
An error is likely to be a mismatch of dimensions meaning that you need to map any differences in dimensions from the source to the target.
Therefore, list out the dimensions present in your source and those in the target and identify any differences.
Time - is there a change in the time dimensions from year to month, month to day etc?
Hierarchies - is the target set at a higher level in the hierarchy?
Missing dimensions - are there any dimensions that are simply missing in the target that are present in the source or vis versa?
Versions - does one module have versions and the other not?
Use system modules to map across these differences in dimensions. For time you could use MOTHVALUE() or YEARVALUE() or LOOKUP within a time systems module the relative parent. Similarly, with a movement down a hierarchy use a systems module dimensioned by the list present in the target to LOOKUP the parent present in the source.
Where there a simply missing dimensions build dedicated mapping modules containing the list present in the target. Use line items formatted as the target dimension that is missing and map each combination of target dimensions into the source list.
Where there are more dimensions in the source use SUM to aggregate the source data into the corresponding target dimension. Create a module dimensioned by the source lists and use a list formatted line item formatted to the list in which you will SUM the data into.
Here if it is coming up in subsidiary view and not coming up ,the reason might be of not matching period . Error we are getting here because we are not matching time dimension properly here . LOOKUP always works on list or time formatted reference . We can have a new line item which matches Target and Source in this case and have LOOKUP of that line item .
Your mapping needs to be a list formatted line item which bridges the gap. If you are using a LOOKUP then it needs to be the same format as the source dimension which is missing from the target. The dimensions of the mapping module must be present in the target too.