Kamil,
It shouldn't throw any errors, the only issue that might occur is that the Tile number might not show up for that error statement. You should not be hitting that under normal circumstances as the tile number is validated in other checks. Few things since you seem to be new to the forums.
1. Modifying VMmark2 source is against the run and reporting rules. Any modification is going to invalidate all the runs you do. I highly recommend reinstalling VMmark 2.5.2 from scratch to make sure your runs are good.
2. Please post new questions to the forum in a new thread (discussion). This discussion is just a notice letting forum users know about the release of 2.5.2.
3. When you post your question, be sure to provide as much detail as possible. We can't help if we don't understand what you're seeing. Typically we ask that you include the output from the run you're referencing so we can review the output files.
Once you post your question in a new discussion someone will assist.