Object reference not set to an instance of an object

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Posted on by Muthusamy

Hi All,

In D365 F&O, we are doing extension based development. I am getting the error 'Object reference not set to an instance of an object' while opening the form. There is no compilation errors. I have done full build also. But, still no luck.

Errors are coming for some of the forms and some of the forms are working fine.

Please share your ideas regarding this issue.

Thanks,

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Development / Customization / SDK

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Adria Ariste User Group Leader on at

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Do you see any additional messages on the Message Center?

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Martin Dráb 240,288 Most Valuable Professional on at

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This means that some code is trying to use an object reference that doesn't point to any object. This isn't something the compiler can identify.

Use the debugger to find out the place where the error is thrown.

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Ali Zaidi 4,657 on at

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Possible you update the visible property of some of the control. I faced the similar problem in extension. That form has multiple extension with different name in different models. when I change the visible Properties of some of control, which client did not want on screen. Similar error occurs. I revert the changes and then control the visible properties in initialized event handler of form in extension class.

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nmaenpaa 101,172 Moderator on at

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You can definetely set visibility of controls in code.

But if you write code in model A, and try to set visibility of control in model B, you need to add reference from model A to model B. Otherwise the code in model A can't see that control. And that's why you get the error.

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Sukrut Parab 71,741 Moderator on at

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You can not find cause of such a error without debugging . So use debugger and see from where it is originating.

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Muthusamy 4 on at

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Hi All,

Thanks for all your valid suggestions. I have checked and everything is okay.

Looks, some of the objects are not compiled and synchronized with DB. we have done the build model wise and synchronization and then one full build, its resolved now.

Thanks,

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babalalex 411 on at

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Hi Muthusamy,

I am getting the same error when I am trying to filter Vendors or Customers in Master forms.

And this error is coming only in UAT server, not DEV server.

I would be grateful if you can give some guidance or suggestions for this.

Regards,

Sudeep Mali.

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nmaenpaa 101,172 Moderator on at

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Did you read and try the suggestions and guidance that were provided already in this discussion?

Anyway you need to reproduce it in dev to investigate so make sure your dev has the same codebase than UAT, then copy UAT data to dev and see if you can repro it.

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babalalex 411 on at

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Nikolaos thanks for your prompt reply.

As the scenario is occurring in UAT only, I am getting this error only when I am trying to filter vendor account or customer account column level in UAT.

Therefore, unable to understand how to approach or resolve this issue.

Also, how can I reporduce the same error scenario in DEV server ?

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babalalex 411 on at

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Hi Sukrut,

In UAT I shall not see any possiblity to use debugger.

Any other wayout?

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