arm-template-merge should give all the issues at the same time

[cateruels]

Summary

While merging arm templates, the output error log, should present all the errors at the same time.

Desired solution

E.G,

Error: Property "parameters.appName" cannot be merged. Source and target values are different.
Error: Property "parameters.environment" cannot be merged. Source and target values are different.

(Obviously, this solution it is considered without unknowingly from the other issue in which the log should show in which files the conflict is happening)

[robinmalik]

How can we debug this 'Source and target values are different' issue? I can't understand what it means.