Hi, I recently have noticed the following suggestion in mkgmap output: "To reduce the run time, consider increasing the amnount of memory available for use by mkgmap by using the Java -Xmx flag to set the memory to more than 196700 MB, providing this is less than the amount of physical memory installed." I run mkgmap to create files for PC installation - overview map, index, tdb. There is no actual compilation of any map. I guess, that condition for triggering the message is wrong in my case and maybe the calculations too. I mean this part of code in Main.java: if ((taskCount > threadCount + 1) && (maxJobs == 0) && (threadCount < runtime.availableProcessors())) { System.out.println("To reduce the run time, consider increasing the amnount of memory available for use by mkgmap by using the Java -Xmx flag to set the memory to more than " + 100* (1 + ((runtime.maxMemory() * runtime.availableProcessors()) / (threadCount * 1024 * 1024 * 100))) + " MB, providing this is less than the amount of physical memory installed."); } Is "taskCount" correct, when input files are only *.img? "threadCount" is probably forced to 1, because I see message: "Setting max-jobs to 1". Then probably there is no need to multiply memory for all processors. I'm not sure about "runtime.maxMemory()". It looks like 24GB which I have allocated with option -Xmx24G. Shouldn't it be a real memory used? Well, all is not a problem really. I just found the message funny and investigated a bit. Btw, there is a typo: "amnount". -- Best regards, Andrzej