File corruption can occur when closing file
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There is a bug in the way that GvrsFile writes out the free-space list when authoring a data file. This bug may lead to a corrupt output file.
Free space records are variable-length records that represent unused sections of a GVRS file. They occur in applications that are using data compression and performing multiple changes to tiles in the GVRS data file. Non-compressed tile records have fixed sizes. But the size of compressed records can change based on their content. Therefore, situations occur when the space that was previously used to store a tile is no longer large enough. The old space is put on the free list. New space is allocated.
The free space information needs to be preserved when a file is closed so that it can be re-used if the file is opened for future data-writing operations. Unfortunately, a bug occurred in the logic that writes this information.
The bug would not occur when the optional checksums were enabled. It only occurred when checksums were shut off.
Bug is now fixed. Thank you for your patience in this matter.