Dear Kevin,

  Thank you for your reply! This is a cryoEM map with grid:
  1023x1023x1023 and physical file size over 4GB:4282397692

  Mapmask has been compiled on a 64bit machine. Is there anything in the
  code need to adjusted for the large dimension?

  Thank you for your advice!

  Jinghua

On Sat, 1 Nov 2008, Kevin Cowtan wrote:

The size of the cell makes no difference. The size of the grid might - but this is checked for. The program should stop if the grid is too big.

Unless you've got a map which won't fit in 4GB of RAM...

Kevin

Jinghua Tang wrote:
 Mapmask behaves normally with small input map. But when I try it on an
 input
 map with Unit cell dimensions:1023.12 1023.12 1023.12 A, the resulting map
 is flipped.

 Do you know whether there is map size limit for mapmask or how to avoid
 map
 flipping?

 Thank you in advance!

 Jinghua




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