How to resolve error "Insufficient memory to continue the execution of the program." when debugging Azure Functions locally?

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This article describes a solution to an error “Insufficient memory to continue the execution of the program.” I was debugging an Azure Function locally and ran into it – it stopped my Azure Function from starting at all.

So, this is what I got:

Insufficient memory to continue the execution of the program.

Ohh… kay..? My development machines have plenty of RAM, surely enough to run an Azure Function!

So what gives?

How to resolve the error?

Okay, okay. So it’s actually super simple and the error is just misleading.

Chances are that you have empty values in your local.settings.json file. Something like shown below:

Just make sure you only have entries with at least the key set up!

And hey – if you have an application setting with an empty key (but the value set), you’ll get an error like this:

Just for the record, here’s the error once more:

String cannot be of zero length. (Parameter 'variable')

Just fill the key for your application setting entries!

With that, you should be good! :)

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Antti K. Koskela

Developer / Architect / Consultant at Koskila / Valo Solutions Ltd. / Norppandalotti Software Co / Alter - Experience Ideas Ltd.

Antti Koskela is a proud digital native nomadic millennial full stack developer (is that enough funny buzzwords? That's definitely enough funny buzzwords!), who works as a Solutions Architect for Valo Intranet, the product that will make you fall in love with your intranet.

He's been a developer from 2004 (starting with PHP and Java), and he's been bending and twisting SharePoint into different shapes since MOSS. Nowadays he's not only working on SharePoint, but also on .NET projects, Azure, Office 365 and a lot of other stuff. He's also Microsoft MVP for Office Development.

This is his personal professional (e.g. professional, but definitely personal) blog.

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