Importing multiple vCard files issue

[csenor]

I purchased a $30 program to convert Excel files into vCard files.  The program successfully created 480 contacts.  When I went to import them into Roundcube, the first screen identifies 480 files, however, when you click to import, only 20 come through.  Any ideas?  Thanks.  This is my first post ever to this forum. 

[alec]

There's a limit in PHP. Join all the files into one or two.