I would like to know how I reference a custom field as part of this visual force page for Opportunity Line Items. The template is from this app, on the Appexchange form Salesforce labs: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N300000016cYlEAI&modal=where_to_install_package

The error states that it is an invalid field, but it's a custom field on the product. 

Any help would be appreciated!

Trying to create a validation where Equipment Feedback is selected in the VOC Description picklist field, and then make the following picklist fields required (with any value). 

AND(ISPickval( VOC_Description__c  ,'Equipment Feedback'),
(Ispickval(Brand__c ,"")
((Ispickval(Condition__c,"")
(Ispickval(Model__c,"")
(Ispickval(Product_Family__c,"")
(Ispickval(Brand__c,"")
(Ispickval(Product_Type__c,"")))))))

I would like to know how I reference a custom field as part of this visual force page for Opportunity Line Items. The template is from this app, on the Appexchange form Salesforce labs: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N300000016cYlEAI&modal=where_to_install_package

The error states that it is an invalid field, but it's a custom field on the product. 

Any help would be appreciated!

Trying to create a validation where Equipment Feedback is selected in the VOC Description picklist field, and then make the following picklist fields required (with any value). 

AND(ISPickval( VOC_Description__c  ,'Equipment Feedback'),
(Ispickval(Brand__c ,"")
((Ispickval(Condition__c,"")
(Ispickval(Model__c,"")
(Ispickval(Product_Family__c,"")
(Ispickval(Brand__c,"")
(Ispickval(Product_Type__c,"")))))))