iconv: unable to allocate buffer for input: Cannot allocate memory
 

iconv: unable to allocate buffer for input: Cannot allocate memory

hello
as title I have this error when I try convert database to uft-8
when I try this command
Code:

# iconv -c -f windows-1251 -t utf-8 vbulletin_db.sql > vbulletin_db_utf8.sql

I get this error
iconv: unable to allocate buffer for input: Cannot allocate memory

any one know hot to fix this ?

thanks so much in advance