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Manju S 7Manju S 7 

Challenge Not yet complete... here's what's wrong: The 'MaintenanceRequest' trigger did not achieve 100% code coverage via your test methods. Make sure to 'Run All' tests in the Developer Console at least once before attempting to verify this challenge.

Challenge Not yet complete... here's what's wrong:
The 'MaintenanceRequest' trigger did not achieve 100% code coverage via your test methods. Make sure to 'Run All' tests in the Developer Console at least once before attempting to verify this challenge.
SwethaSwetha (Salesforce Developers) 
HI Manju,
Please note that Questions about how to pass Trailhead challenges are not on topic, because these challenges are intended to be independent demonstrations of your abilities.

Trailhead Help (https://trailhead.salesforce.com/en/help?support=home)can provide assistance for situations where Trailhead does not appear to be functioning correctly. You can reach out to them if this is the case.

If this information helps, please mark the answer as best. Thank you