Error: WARNING: saveBlock: Block failed to save

[kittykat3331]

Here's from the debug text:
18:10:55: ACTION[ServerThread]: Player Tomas moved too fast; resetting position
18:10:55: ACTION[ServerThread]: Player Tomas moved too fast; resetting position
18:10:55: ACTION[ServerThread]: Player Tomas moved too fast; resetting position
18:11:00: WARNING: Assignment to undeclared global "totalnodes" inside a function at ...2\minetest-0.4.12\bin\..\mods\ambience\ambience\init.lua:259.
18:11:10: ERROR[ServerThread]: WARNING: endSave() failed, map might not have saved.WARNING: beginSave() failed, saving might be slow.WARNING: saveBlock: Block failed to save (-2,0,-2): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,-3,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,-2,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,-1,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,0,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,1,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,2,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,3,-3): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,-3,-2): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,-2,-2): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,-1,-2): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,0,-2): database is locked
18:11:24: ERROR[ServerThread]: WARNING: saveBlock: Block failed to save (-8,1,-2): database is locked



This has been happening with the 0.4.11 version and now 0.4.12
I created a new world in the .12th version and this error has happened several times now. Each time, I shut down the server because the longer I wait, the more blocks "fail to save" and get deleted - mostly buildings and things that have been built in the game. Can't build anything without worrying about this happening again... it seems to happen randomly.
I use Windows vista, and the 0.4.9 version that was first used didn't have this error ... maybe it's a new mod that was installed?

Here are the mods in this world/ server:
ambience, angled_walls, apartment, beds, bilboard, bitchange, carpet3d, carts, caverealms, factory, farming_plus, food, homedecor, hud, kerova, memorandum, meseconds, mobs, money, moreblocks, paintings, prestibags, secret_passage, trash_can, travelpoints, unified_inventory, walking_light, WorldEdit

Out of those, these are the more recent:
ambience, apartment, bitchange, hud, money, mesecons, mobs, farming-plus, presibags...

I'm willing to take out a mod to see if it would fix the problem. I'm thinking that it could be a mod that I've installed during the .4.11 version that I've copied to the .4.12 version causing the issue. Please help! >.<

[maikerumine]

Question: Are you using a map saved offline for your world?

I ask because I get the same error on my saved maps until I change the world to a singlenode world, but it still occurs.

Also, I have noticed this in other worlds of mine too, with odd blocks being formed at random places.