Specified argument was out of the range of valid values. Parameter name: Index value is out of range
Hello all,
I've been facing this error as it's shown in the screenshot and Subject, it occurs when i try to save the record after filling the required fields.
does anyone familiar with this error ? it's pretty urgent so I'll appreciate it if anyone provided the solution.
Thanks in advance. 
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Greetings!
The issue is that if you remove the requirement for the "ReactionTimeUnit" and "SolutionTimeUnit" fields and leave them empty, you won’t be able to save the record.
An error will occur:
"Specified argument was out of the range of valid values. Parameter name: Index value is out of range"
These fields are mandatory because the entire out-of-the-box product logic of the Service relies on them being filled in.
As a workaround, you can set default values for these fields, and everything will work fine.
Alternatively, you can build your application completely independent of the out-of-the-box functionality.
Regards,
Orkhan