Error editing users

[f_lombardo]

When I try to edit an user I get the following error:

Warning: Invalid argument supplied for foreach() in C:\xampplite\htdocs\letoDMS-2.0\op\op.UsrMgr.php on line 189

Warning: Invalid argument supplied for foreach() in C:\xampplite\htdocs\letoDMS-2.0\op\op.UsrMgr.php on line 192

Warning: Invalid argument supplied for foreach() in C:\xampplite\htdocs\letoDMS-2.0\op\op.UsrMgr.php on line 197

Warning: Invalid argument supplied for foreach() in C:\xampplite\htdocs\letoDMS-2.0\op\op.UsrMgr.php on line 200

Warning: Cannot modify header information - headers already sent by (output started at C:\xampplite\htdocs\letoDMS-2.0\op\op.UsrMgr.php:189) in C:\xampplite\htdocs\letoDMS-2.0\op\op.UsrMgr.php on line 234

Thanks a lot.

Bye

Franco