Final answer:
The special challenges in finding and fixing errors in concurrent software stem from the timing and interactions of concurrent processes, making such bugs difficult to reproduce.
Step-by-step explanation:
Finding and fixing errors in concurrent software comes with special challenges because the issues often relate to timing and the non-deterministic interaction between threads or processes. These errors, also known as concurrency bugs, can be tricky to reproduce because they might only occur under specific conditions that are difficult to anticipate and create strictly through testing. A new test program that generates an error more frequently could be advantageous because it helps in identifying the conditions that lead to the error, thus making it easier for developers to understand and address the root cause of the issue.
To convince management about the efficacy of a new test program over the original, it's important to demonstrate that the program is not only capable of producing the error more consistently, but also that it provides actionable insights that can help fix the error. If your test program generates the error more often in a controlled environment, it may indeed be a better tool for pinpointing and ultimately resolving concurrency issues in the software.