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Dynamics NAV Microsoft

The .NET Framework object System.IO.Directory cannot run on this client

The .NET Framework object System.IO.Directory cannot run on this client.

The .NET Framework object System.IO.Directory cannot run on this client.

in a computer running NAV 2013 client.

Solution 1 (suggested by me):
Install the Microsoft .NET Framework 4.5 then restart the Client.

Solution 2 (suggested by Microsoft):
How to: Set .NET Framework Types to Run on the Microsoft Dynamics NAV Windows Client or Microsoft Dynamics NAV Server Computers

I suggest always to read the official documentation about the requirements for the product you are want use:
Requirements for Microsoft Dynamics NAV 2013

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Categories
Dynamics NAV Microsoft

This message occurred because a nonzero value was found

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Microsoft Dynamics NAV Development Environment
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You cannot delete or change the type of the {FieldName} field (in the {TableName} table) before the value in the field is reduced to 0 (zero) or ” (blank) in all records. This message occurred because a nonzero value was found for the record {PKFieldName}='{PKFieldValue}’ in company {CompanyName}.
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OK
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This message occurred because a nonzero value was found

Cause:
To change the definition of a field this doesn’t have to contain data.

Solution:
Delete all the values in the {FieldName} column (of the {TableName} table) for all the companies.
Note: the error message will show the first value the system will find, remember that you have to delete values also in the other companies.

HOW TO change data for all Companies?

If you want you can create a new field as a copy, create a Report for service to move data in the new field before to delete all the data and change the definition of the field. Then you could restore the original data in the original field.

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