merge issue - files not updated because of svn commits fail

Hi All
We are using svn 1.6 - we tried merging from Trunk to a feature branch
using svn merge (automatically).
We just found out that some files are not updated with the merges but
mergeinfo has already indicated and ci with the messages that those files
are merged.
We like to perform svn merge again using the same revision number from the
trunk to the feature branch would svn refuse simply because it was merged
"successfully" before ?

Are there side effects in applying svn merge again on the same revision
numbers from the mergeinfo property ?

Thank you.
Sincerely
Received on 2013-08-31 19:39:19 CEST