Reuse_Feildcatlog_merge

Hi Experts,

I am working In ECC 6.0. I am using the funtion module '<b>REUSE_FEILDCATLOG_MERGE'</b>. If i pass the internal table structure to this function module the feild catlog is not creating and if i create a structure in <b>SE11</b> and if pass it is generating the feild catlog. But here i must not create any global structure . Is there any way with out creating the global structure i can populate the feild catlog.