Total newbie, needing to learn a little ADA code

hi, i am a total newbie needing to learn a little ADA on a giant ADA code/files. my boss wants me to troubleshoot where an error is caused by some ADA file of a 100+ set of ADA files. i have no idea where to start learning a little ADA so i can even work on the task. can someone please point me in the right direction of learning some ADA?

thank you!

What is the exact compiler message or what kind of exception is raised?

I can offer an introductory PowerPoint course (in English or German) on the basis of Ada 95 with appropriate later amendments affecting 95 features:

It’s my personal view of Ada.