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Frequent Visitor

Odata filtering a dataverse lookup column for ne value x, including null value

Hello, I am trying to use List Rows action to filter a dataverse lookup column (fieldnameC) in Power Automate to include null values and all values except value 'GUIDX'.


I am struggling to get this filter to work - I've tried many iterations and can't seem to get them to work together. Here is my whole filter expression fieldnameA & B are working well, just including them here in case it's affecting the output:


fieldnameA eq '@{outputs('Compose')}' and fieldnameB eq true and (_fieldnameC_value ne GUIDX or _fieldnameC_value eq null)

One error I've been landing at is: a binary operator with incompatible types was detected. found operand types 'fieldnameC' and 'edm.guid' for operator kind 'notequal'."

Is there an impossible interaction between a GUID and a ne operator? How can I eliminate the single GUIDX from my results?


Accepted Solutions
Frequent Visitor

I had a bad filter on fieldnameB and have got the flow working with the below filter and no single quotes on the guid:

_fieldnameC_value ne GUIDX

View solution in original post

Multi Super User
Multi Super User

Apologies as I am running out the door but wanted to ask.


(_fieldnameC_value ne GUIDX


looks like a lookup column and you are trying to ignore a certain lookup GUID value correct?

Multi Super User
Multi Super User


I guess you missed single quote around the GUIDX in your filter 

(_fieldnameC_value ne 'GUIDX' or _fieldnameC_value eq null)


It should look something like this with the GUID value

fieldnameA eq '@{outputs('Compose')}' and fieldnameB eq true and (_fieldnameC_value ne 'b5eac9fa-6157-eb11-a812-000d3a6b5d29' or _fieldnameC_value ne null)


Personally, I always use the FetchXML Builder tool to build the filter query if you are not familiar with the filter operators. Here are a couple of blog posts from the community on how to use the tool to generate the filter rows parameter.




See I wasn't sure he did because in the written part he says 'GUIDX' value with single quotes and then in the  formula note, so I was like hmm is this just a placeholder instead of typing the guid lol.

Frequent Visitor

Yes, exactly. Thanks.

Hi Linn, thanks for looking at this. 

I'd tested that in my iterations,

fieldnameA eq '@{outputs('Compose')}' and fieldnameB eq true and (_fieldnameC_value ne 'b5eac9fa-6157-eb11-a812-000d3a6b5d29' or _fieldnameC_value ne null)

and when I run it with a guid value other than x it shows a successful run but I get no outputs in my flow:




Frequent Visitor

I had a bad filter on fieldnameB and have got the flow working with the below filter and no single quotes on the guid:

_fieldnameC_value ne GUIDX

I see. The single quotes on the GUID are optional. Thanks for getting back with your findings.




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