System.ArgumentNullException: Value cannot be null. Parameter name: g

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Hi All,

I have created Custom entity on CRM 2015 Update 1 system, it was working fine but suddenly I'm getting below error,

Error :

An error has occurred. Try this action again. If the problem Continues, check the Microsoft Dynamics CRM Community for solutions or contact your organization's Microsoft Dynamics CRM Administrator. Finally, you can contact Microsoft Support.

As you can see above error is not saying anything in details it is just the generic error.

When I go to a quick create of custom activity then I have received below error,

Error description :

Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=7.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #E78B7108Detail:
<OrganizationServiceFault xmlns:i="www.w3.org/.../XMLSchema-instance" xmlns="schemas.microsoft.com/.../Contracts">
<ErrorCode>-2147220970</ErrorCode>
<ErrorDetails xmlns:d2p1="schemas.datacontract.org/.../System.Collections.Generic" />
<Message>System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #E78B7108</Message>
<Timestamp>2015-10-02T09:11:47.2130877Z</Timestamp>
<InnerFault>
<ErrorCode>-2147220970</ErrorCode>
<ErrorDetails xmlns:d3p1="schemas.datacontract.org/.../System.Collections.Generic" />
<Message>System.ArgumentNullException: Value cannot be null.
Parameter name: g</Message>
<Timestamp>2015-10-02T09:11:47.2130877Z</Timestamp>
<InnerFault i:nil="true" />
<TraceText i:nil="true" />
</InnerFault>
<TraceText i:nil="true" />
</OrganizationServiceFault>

Your help is appreciated.

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Suggested answer

keoma 32,729 on at

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it seems that this is a serialization/deserialization issue with your custom entity. what is parameter g ? which type is it (simple/complex) ?

follow community.dynamics.com/.../166308 and best you contact Abhishek Bakshi directly. he had a similar error and started a ticket at MS support.

also follow

blogs.msdn.com/.../crm-2011-sdk-error-while-using-the-create-method-system-argumentnullexception-value-cannot-be-null.aspx

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Aiden Kaskela 19,696 on at

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Hi Pratik,

This is usually a bug coming from a custom plugin. Do you have any plugins registered on your custom entity, or maybe a synchronous workflow that calls a custom workflow step? If you have plugins registered, disable them via the plugin registration tool and retest it. When you see this error coming out of a c# assembly the most likely case is you're passing around a null value to your methods and it's expecting something. ex: A method takes the most recent sales order for a customer but there are no orders.

If this was helpful I'd appreciate if you would mark this as a verified answer.

Thanks,

Aiden

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Community Member on at

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Hi Aiden & jonathan

Thanks for your interest & response to above question.

@Aiden : Neither I don't have any custom plugin registered with custom entity nor synchronous workflow.

@Jonathan : Thank you for sharing Abhishek Bakshi's post, I have already seen it & tried to contact him, as you can see I have posted comment on his post already.

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Community Member on at

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I have solved above issue & good news is my custom entity working fine now.

In case anybody struggling with the same issue then try out below thing, this is what MS said,

In the meantime I checked the traces from our live meeting and I found a “ClassId is not set on the following control: placeHolder_{beb58444-cb68-b694-6da9-212b73d2dd5a}_{d7c1603b-c1ab-857c-497c-8277733ba03b}” error. I then checked the customizations.xml file from the solution you sent and found the above mentioned placeholder without a classid defined. The error from the trace is straight forward. Every control in the form needs to have a classId defined. If this is not defined, you will run into the above error. Based on this, I commented the following bid of xml on the customizations.xml file of the 'CustomEntity' solution entity you sent:

<cell id="{306a305c-d9b8-6733-5c76-de20b7888c4b}" showlabel="false">
<labels>
<label description="" languagecode="1031" />
</labels>
<control id="placeHolder_{beb58444-cb68-b694-6da9-212b73d2dd5a}_{d7c1603b-c1ab-857c-497c-8277733ba03b}" />
</cell>

Regarding the solution:
- On the test environment I confirm that the error now was related to other placeholder like I suspected
- I edited the customizations.xml in order to comment the 2 corrupt placeholder
- This failed again with a different placeholder
- Once on the particular section was more than 10 placeholders, I decided to comment the entire section and this action resolved the issue. After importing the solution with the commented section I can now open the forms and create new ones on the 'CustomEntity' entity.

Happy hours !!!

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