Magento API Array Options

[mpw5013]

Good Afternoon,

I'm having an issue. I know how to read the API documentation, but I can't find what other attributes I can add to the array. I need to import UPC and the var_dump shows a 'upc' field, but Its not working. Here is my question. How do I know what attributes I can put into the array? What file will show that info?

*********************** Magento API Snippet **********************************

catalog_product.update

Update product

Return: boolean

Arguments:

mixed product - product ID or Sku
*** array productData - array of attributes values ***
mixed storeView - store view ID or code (optional)

[Zero13]

You should ask magneto forum from their official web site.

[mpw5013]

Trying that too. Still nothing. I'm assuming that there is a master API file with all of the functions. Something to reference.