Workflow Error

Lubica Cverckova

February 14, 2023 20:28

Hello,

We have a workflow set in place, called 'Transformer Change Out'. It basically allows you to select a transformer on a map that's been changed out in a field and then fill out info in a form and submit.

Recently, we are getting the error while selecting the transformer:

There was a workflow error running activity: Exception has been thrown by the target of an invocation. Workflow 'TransformerChangeOut' failed Unhandled exception: 'Object reference not set to an instance of an object.' in activity '1.531: If Unit 3 = 0 or N/A'. Object reference not set to an instance of an object.

The problem is the error doesn't come on other transformers only on a few. Hence, it's hard to troubleshoot what's causing the issue since I can select other transformers and submit the form.

Please, let me know how to resolve it.

Thanks.

 

 

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  Nico Burgerhart

  February 15, 2023 10:02

  The issue is in the check in (I guess) an If activity. A reference is expected to contain a value, but contains Nothing / an empty object. I guess the check is done on a field value, and I guess the value will be different between transformers, that's why it goes wrong on some transformers.

  The solution will be to modify the check.

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  Lubica Cverckova

  February 15, 2023 20:23

  Thank you for your time to respond.

  To be honest with you I am not sure what you mean by 'modifying the check'. Or where I would go to modify it. If you could explain this a little bit more in depth, that would be appreciated.

  Thanks.

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  Nico Burgerhart

  February 16, 2023 11:33

  Which activitty is the activity referenced by 1.531 (you can search on this number in the Workflow Designer search function)
  Which expression is used there / which check is done?

  Perhaps you can upload the workflow here?

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  Lubica Cverckova

  February 16, 2023 16:20

  Thanks, I think I found it. I think the activity/check says if the transformer unit ID3=0 then flag it as an error. I can be wrong here. We have many transformers where Unit ID 3=0 and don't have issue to proceed to the next step. 

  Anyway, the workflow is quite long. Would it be possible to email it to you? It doesn't seem like I can attach a file using this application. Thanks.

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  Nico Burgerhart

  February 16, 2023 16:37

  Sure nico.burgerhart(at)sweco.nl

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  Lubica Cverckova

  February 23, 2023 18:25

  Hi,

  Just to let you know I was able to resolve the error. The issue was that the value was expected to be 0 and in GIS the value was Null. Hence, when I updated the relevant fields to 0, the workflow error no longer comes up. 

  Thanks for helping me out to troubleshoot.

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