Unable to deploy with SAM Template Parameters

[brettnem]

Describe the bug When a SAM template contains parameters, the deploy operation fails with the following error: Usage: sam sync [OPTIONS] Try 'sam sync -h' for help.

Error: Invalid value for '--parameter-overrides': "MQ_BROKER"="xxxx" is not in valid format. It must look something like 'ParameterKey=KeyPairName,ParameterValue=MyKey ParameterKey=InstanceType,ParameterValue=t1.micro' or 'KeyPairName=MyKey InstanceType=t1.micro'

Process finished with exit code 2

To reproduce

1. Create SAM Template with Parameters
2. Deploy, set the template parameters
3. Notice deployment failure message

Expected behavior Expected deployment with template parameters

Screenshots

Your Environment

• OS: OSX Sonoma 14.0
• JetBrains product: PyCharm
• JetBrains product version: 2023.2.5
• AWS Toolkit version: 1.87-232
• SAM CLI version: 1.103.0
• JVM/Python version: Python 3.9.12

[brettnem]

In my testing, I have found that it seems that an underscore "_" in my parameter names is breaking deployments. Everything works fine if I switch to camelCase.

[manodnyab]

This is a related issue: https://github.com/aws/aws-sam-cli/issues/1937#issuecomment-619046221. Parameter override does not accept underscore