Oracle Apps R12.1 installation error-AC-00402: Unable to read driver file

While installing EBS R12.1 if we encounter below error:


 |          0% completed           AC-00402: Unable to read driver file: /u01/oracle/DEV121/db/tech_st/11.1.0/appsutil/template/addbtmpl.drv
RW-50010: Error: - script has returned an error:   1
RW-50004: Error code received when running external process.  Check log file for details.
Running Database Install Driver for DEV121 instance


Seems the files which were downloaded were corrupted


Check stage area according to MD5 Checksums for R12.1.1 Rapid Install Media [ID 802195.1]
Once all checks were passed re-try installation. In my case, I saw 2 warnings in the stage area which cause the issue. I downloaded files again and tried.

[root@ebs122 APPS12.1]# md5sum --check md5sum_Linux64.txt > r12_check_result.txt

md5sum: WARNING: 3 of 1887 computed checksums did NOT match
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