Purchase order v1.3

[Guest]

Hi All,

 

I tried to use purchase order module 1.3 and 1.4 with ms2. Everything works except for the orders tab at the back end. I am getting the following error.

 

Fatal error: Call to undefined function: tep_array_merge() in /test/catalog/admin/orders.php on line 347

 

can someone please help me?

 

Thanks,