undef problem even when the module is present.

[Manjeet.Singh Sardar (AC/EDD)]

Hi, 

I have developed ftp clients modules to support passive mode for ipv4 and ipv6(courtesy to Erlang users)by modifying the ftp.erl file from the R8 version.It is working fine  but sometimes i get a "undef" error(i know that this error comes when the called module is not found)   when trying ftp open function. could someone give me some idea what could be the mistake i am making.

Pls see that this error occurs only sometimes, rest of the time it works fine, but once this error comes it contiuesly occur till i restart the application.
{'EXIT',{undef,[{my_ftp_passive_ipv6,open,["5001:1::8"]},{my_ftp,ftp_client,8}]}}


Thanks and Regards
Manjeet