Why the function .cardinality() doesnt work with a permutation group ?

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Hi Im using 6.3 A couple of week ago it used to work.

For example

 sage: cube = PermutationGroup(["(3,2,6,7)(4,1,5,8)","(1,2,6,5)(4,3,7,8)", "(1,2,3,4)(5,6,7,8)"])
sage: cube
Permutation Group with generators [(1,2,3,4)(5,6,7,8), (1,2,6,5)(3,7,8,4), (1,5,8,4)(2,6,7,3)]
sage: cube.cardinality()
Traceback (most recent call last):
...
TypeError: Gap terminated unexpectedly while reading in a large line:
Gap produced error output
Error, file "/Users/hectorbanos/.sage/temp/MBP-de-Hector.banorte.com/902/interface/tmp909" must exist and be readable

   executing Read("/Users/hectorbanos/.sage/temp/MBP-de-Hector.banorte\.com/902/interface/tmp909");

I tried your example and it worked, but I don't know why mine does not work.

your problem seems related to your personal temporary files (within the /Users/hectorbanos/.sage/temp/ directory). You can try the following:

• stop Sage
• remove the /Users/hectorbanos/.sage/temp/ directory
• start Sage and try again

Note that it works well for me :

sage: cube = PermutationGroup(["(3,2,6,7)(4,1,5,8)","(1,2,6,5)(4,3,7,8)", "(1,2,3,4)(5,6,7,8)"])
sage: cube
Permutation Group with generators [(1,2,3,4)(5,6,7,8), (1,2,6,5)(3,7,8,4), (1,5,8,4)(2,6,7,3)]
sage: cube.cardinality()
24

I removed the remove the /Users/hectorbanos/.sage/temp/ directory but the error still stands. What else I can do?. By the way thanks for the help