Call to undefined function SC_Mail_Image()

[B]Hello,

Receiving the following error when trying to use the retrieve password in the security module. The function was working a few days ago but now results in this error. The error arrives when you enter the username and click OK.

Fatal error[/B]: Call to undefined function SC_Mail_Image() in …/app_retrieve_pswd/app_retrieve_pswd_apl.php on line [B]2295

Appreciate any help with solving this.[/B]