System.NullPointerException: Attempt to de-reference a null object-RollupFlowBulkProcessor

[SalesforcePard]

Hi there,
I've got this setup in a sandbox & I'm getting the below error when running this off of a flow on the Opportunity.
I've got the Rollup settings Org defaults set correctly and the line of code added to the Opp trigger.
I guess i've missed something somewhere. Appreciate any help or steer in the right direction

11:00:04.30 (8365612278)|CODE_UNIT_FINISHED|RollupFlowBulkProcessor.addRollup(List<RollupFlowBulkProcessor.FlowInput>)
11:00:04.367 (8367353510)|FLOW_ACTIONCALL_DETAIL|8820264d7509972f277e6032a0d184b381f66-fbc8|Opp_Rollups|Apex|RollupFlowBulkProcessor|false|An Apex error occurred: System.NullPointerException: Attempt to de-reference a null object

11:00:04.367 (8367629427)|FLOW_VALUE_ASSIGNMENT|8820264d7509972f277e6032a0d184b381f66-fbc8|Opp_Rollups|false
11:00:04.367 (8371885688)|FLOW_BULK_ELEMENT_END|FlowActionCall|Opp_Rollups|0|1342
11:00:04.367 (8405498150)|FLOW_VALUE_ASSIGNMENT|8820264d7509972f277e6032a0d184b381f66-fbc8|error.errorId|1890161727-93198 (234230620)
11:00:04.367 (8405545220)|FLOW_VALUE_ASSIGNMENT|8820264d7509972f277e6032a0d184b381f66-fbc8|error.type|FLOW_INTERVIEW_SAVE_RESULT
11:00:04.367 (8405558752)|FLOW_VALUE_ASSIGNMENT|8820264d7509972f277e6032a0d184b381f66-fbc8|error.message|An Apex error occurred: System.NullPointerException: Attempt to de-reference a null object

11:00:04.367 (8405571493)|FLOW_VALUE_ASSIGNMENT|8820264d7509972f277e6032a0d184b381f66-fbc8|error.endUserMessage|An Apex error occurred: System.NullPointerException: Attempt to de-reference a null object

11:00:05.450 (9450452783)|FLOW_ELEMENT_ERROR|An Apex error occurred: System.NullPointerException: Attempt to de-reference a null object

[jamessimone]

@SalesforcePard are you setting any optional values that are asked of the Invocable action? You’ll be able to see a more detailed stacktrace - which would be really helpful to provide - if you keep your Apex Developer Console open and open the log that gets created when this error occurs, but to me this is sounding like an issue with one of the properties being passed to the Invocable. Looking foreword to getting more info so I can help diagnose further!

[SalesforcePard]

HI @jamessimone I've done this both ways, both with or without any of the optional values. I've attached the whole log. I've walked back through the setup steps as well to make sure i've not missed anything but apex is not my strong point so I'm at a loss here.

apex-07L7Z00000Y4gerUAB.log

[jamessimone]

@SalesforcePard this is a fascinating log! Two things I noticed while looking at it:

• you may want to change the casing of your where clause so that it read IsDeleted = false - there are some sections of Apex where referring to a field name by its properly cased API name matters
• how are you setting the Rollup Operation field? Is that coming from a Rollup Custom Metadata record? I'm asking because it seems that it's somehow set to UPDATE_COUNT, when it really should be COUNT. The reason for this is that the Flow-specific code paths in Apex Rollup append the Flow Context (which is correctly set to UPDATE, although if this flow is also running on create then you would have wanted UPSERT) to the value provided from each CMDT record. In this case, that ends up setting the "rollup operation" to UPDATE_UPDATE_COUNT, which of course doesn't exist and which leads to the null pointer error you're experiencing

It feels like we're close to getting this one wrapped up - hopefully that info helps!