Hi, we have somewhere a leakage which doesn't free unicode strings in kernel mode. After a short time of compiling ros on ros, I see many blocks with the tag USTR: ... Tag 52545355 (USTR) Blocks 714270 Total Size 53114920 Average Size 74 ... TotalBlocks 758557 TotalSize 66314608 AverageSize 87 Freeblocks 21427 TotalFreeSize 323088 AverageFreeSize 15 - Hartmut