Attempting to import item classes and I am getting a “Value cannot be null. Parameter name: Key” error. Any idea what may be causing this error?
Value cannot be null. Parameter name: key how do I resolve this?
![](https://uploads-us-west-2.insided.com/acumatica-en/attachment/b6adc82b-696b-4426-bcc5-a1abb5f69f12.png)
![](https://uploads-us-west-2.insided.com/acumatica-en/attachment/bd0802e7-1141-49d6-b093-6224add30cc5.png)
Hello,
It looks like the Source Fields are missing. Have you connected your Data Provider (Top of screen is hidden)?
The Data provider contains the values that you need to select in the Source/Value column.
![](https://uploads-us-west-2.insided.com/acumatica-en/attachment/e9fd71fc-8cd0-41c4-b179-f7830da51e23.png)
Laura
So I got it to work! But noticed that I’m not sure how my item class field needs to be formatted in my excel sheet.
In my excel sheet I had the item class formatted
OGS-AMENDME-BIOCHAR
Acumatica imported it as
OGS-AME-NDME-BI-OCHAR__-
So do I need to make sure anything not 7 characters has enough spaces to make it 7?
Class: OGS
SubClass1: AMENDME
SubClass2: BIOCHAR
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