Add New Product - Fatal Error

When I select "Add New Product" in the Admin area a page of code appears, beginning with:

$WA_DFP_UploadStatus = array(); $WA_ImageContentTypes = array("image/gif" => true , "image/jpeg" => true, "image/pjpeg" => true, "image/x-png" => true, "image/png" => true); define('WADFP_FIT_TO_BOX', '1'); ...

and ending with:

Fatal error: Call to undefined function wa_dfp_setupuploadstatusstruct() in /var/www/html/powerstore/admin/products_insert.php on line 133

Everything else (so far) seems to be working ok.
Can you assist me please?
Thanks, Anita

sounds like the webassist/file_manipulation/helperphp.php file you have on your server has become corrupted.

download a fresh copy of the power store files from the download center and re upload a good copy of the file.

Thanks Jason. You were right - a new copy of the helperphp.php file worked. But, the files in the webasist folder are not part of the power store files.

Luckliy I had downloaded a backup of the webasist folder weeks ago, and restoring a previous version of helperphp fixed the problem.

Sorry, should have mentioned they are in the install/webassist folder in the downloaded zip file.