The below are the most common issues you face if you are working in SAP BI support project
1) Transactional RFC Error(trfc) – Non Updated IDOCs in the Source System
2) Time Stamp Error.
3) Error occurred due to Short Dump.
4) Job Cancellations in R/3 Source System.
5) Incorrect data in
6) ODS Activation
7) Caller 70 is
8) Attribute Change Run Failed – ALEREMOTE was locked
9) SAP R/3 Extraction Job Failed.
10) File not found (System Command for file check failed)
11) Table space issue
12) How is it possible to restart a process chain at a failed step/request?
Check the below document which explains every error and how to solve it.