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Specified argument was out of the range of valid values.

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Article ID:
218
Date Created
Sunday, February 10, 2019
This Article Has been Viewed
885 times
Short Desc
When using a Flash upload script to upload files to a Windows 2016 Server, you must have the proper permissions set on the folder the files are going to be uploaded to.
Details
Flash Upload scripts used under the new Windows 2016 server environment need special permission to write to the folder. If the folder does not have this permission you will get the error:

System.ArgumentOutOfRangeException: 'Specified argument was out of the range of valid values.
Parameter name: startIndex'
Recreate Issue
The folder in question did not have the proper permission set for it, in which case, caused the script to not run.
This mainly happens with Upload scripts that use Flash uploaders.
I am not entirely certain if this is the only cause, with it being Flash.
However, it is the issue in the case of this particular issue.
Resolve Issue
To Resolve this issue.

Browse to the folder the website is located in.
Right Click on the Folder and choose [Properties]
Next, choose the [Security] Tab
Click the [Edit] button
Then, click [Add...]
Next, type in the following name: Authenticated Users
Click [OK]
Click [Apply]
Click [OK]
Click [OK] on the Last tab
And now you should be able to reload the page, and it should work as expected.

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