[GAP Forum] fatal error in IdSmallGroup

Wed Mar 16 05:56:11 GMT 2005

Dear GAP users. 

I am running a GAP program that works on about 45Mb of data. I got the
following error -

Error, IdSmallGroup: fatal Error. Please mail group to
Hans-Ulrich.Besche at math.rwth-aachen.de called from
ID_GROUP_FUNCS[inforec.func]( G, inforec ) called from
IdGroup( Group( pp ) ) called from
PolyID( pp ) called from
PolyURL( pp, depth - 1 ) called from
PolyURL( pp, depth - 1 ) called from
...
Entering break read-eval-print loop ...
you can 'quit;' to quit to outer loop, or
you can 'return;' to continue
brk>

Unfortunately, nobody replied when I emailed the given email address.

Some more output...

brk> G;
<permutation group of size 528 with 3 generators>
brk> pp;
[
(1,3)(2,4)(5,7)(6,8)(9,11)(10,12)(13,15)(14,16)(17,19)(18,20)(21,23)(22,

24)(25,27)(26,28)(29,31)(30,32)(33,35)(34,36)(37,39)(38,40)(41,43)(42,

44)(45,91)(46,92)(47,89)(48,90)(49,95)(50,96)(51,93)(52,94)(53,99)(54,

100)(55,97)(56,98)(57,103)(58,104)(59,101)(60,102)(61,107)(62,108)(63,

105)(64,106)(65,111)(66,112)(67,109)(68,110)(69,115)(70,116)(71,113)(72,

114)(73,119)(74,120)(75,117)(76,118)(77,123)(78,124)(79,121)(80,122)(81,
    127)(82,128)(83,125)(84,126)(85,131)(86,132)(87,129)(88,130),

(1,9)(2,10)(3,12)(4,11)(7,8)(13,41)(14,42)(15,44)(16,43)(17,37)(18,38)(19,

40)(20,39)(21,33)(22,34)(23,36)(24,35)(25,29)(26,30)(27,32)(28,31)(45,

53)(46,54)(47,56)(48,55)(51,52)(57,85)(58,86)(59,88)(60,87)(61,81)(62,

82)(63,84)(64,83)(65,77)(66,78)(67,80)(68,79)(69,73)(70,74)(71,76)(72,

75)(89,97)(90,98)(91,100)(92,99)(95,96)(101,129)(102,130)(103,132)(104,

131)(105,125)(106,126)(107,128)(108,127)(109,121)(110,122)(111,124)(112,
    123)(113,117)(114,118)(115,120)(116,119),

(1,5)(2,8)(3,7)(4,6)(9,41)(10,44)(11,43)(12,42)(13,37)(14,40)(15,39)(16,

38)(17,33)(18,36)(19,35)(20,34)(21,29)(22,32)(23,31)(24,30)(26,28)(45,

49)(46,52)(47,51)(48,50)(53,85)(54,88)(55,87)(56,86)(57,81)(58,84)(59,

83)(60,82)(61,77)(62,80)(63,79)(64,78)(65,73)(66,76)(67,75)(68,74)(70,

72)(89,93)(90,96)(91,95)(92,94)(97,129)(98,132)(99,131)(100,130)(101,

125)(102,128)(103,127)(104,126)(105,121)(106,124)(107,123)(108,122)(109,
    117)(110,120)(111,119)(112,118)(114,116) ]
brk> GeneratorsOfGroup(G);
[
(1,3)(2,4)(5,7)(6,8)(9,11)(10,12)(13,15)(14,16)(17,19)(18,20)(21,23)(22,

24)(25,27)(26,28)(29,31)(30,32)(33,35)(34,36)(37,39)(38,40)(41,43)(42,

44)(45,91)(46,92)(47,89)(48,90)(49,95)(50,96)(51,93)(52,94)(53,99)(54,

100)(55,97)(56,98)(57,103)(58,104)(59,101)(60,102)(61,107)(62,108)(63,

105)(64,106)(65,111)(66,112)(67,109)(68,110)(69,115)(70,116)(71,113)(72,

114)(73,119)(74,120)(75,117)(76,118)(77,123)(78,124)(79,121)(80,122)(81,
    127)(82,128)(83,125)(84,126)(85,131)(86,132)(87,129)(88,130),

(1,9)(2,10)(3,12)(4,11)(7,8)(13,41)(14,42)(15,44)(16,43)(17,37)(18,38)(19,

40)(20,39)(21,33)(22,34)(23,36)(24,35)(25,29)(26,30)(27,32)(28,31)(45,

53)(46,54)(47,56)(48,55)(51,52)(57,85)(58,86)(59,88)(60,87)(61,81)(62,

82)(63,84)(64,83)(65,77)(66,78)(67,80)(68,79)(69,73)(70,74)(71,76)(72,

75)(89,97)(90,98)(91,100)(92,99)(95,96)(101,129)(102,130)(103,132)(104,

131)(105,125)(106,126)(107,128)(108,127)(109,121)(110,122)(111,124)(112,
    123)(113,117)(114,118)(115,120)(116,119),

(1,5)(2,8)(3,7)(4,6)(9,41)(10,44)(11,43)(12,42)(13,37)(14,40)(15,39)(16,

38)(17,33)(18,36)(19,35)(20,34)(21,29)(22,32)(23,31)(24,30)(26,28)(45,

49)(46,52)(47,51)(48,50)(53,85)(54,88)(55,87)(56,86)(57,81)(58,84)(59,

83)(60,82)(61,77)(62,80)(63,79)(64,78)(65,73)(66,76)(67,75)(68,74)(70,

72)(89,93)(90,96)(91,95)(92,94)(97,129)(98,132)(99,131)(100,130)(101,

125)(102,128)(103,127)(104,126)(105,121)(106,124)(107,123)(108,122)(109,
    117)(110,120)(111,119)(112,118)(114,116) ]
brk> IdGroup(Group(pp));
Error, IdSmallGroup: fatal Error. Please mail group to
Hans-Ulrich.Besche at math.rwth-aachen.de called from
ID_GROUP_FUNCS[inforec.func]( G, inforec ) called from
Error( "IdSmallGroup: fatal Error. Please mail group to\n",
 "Hans-Ulrich.Besche at math.rwth-aachen.de" ); called from
ID_GROUP_FUNCS[inforec.func]( G, inforec ) called from
IdGroup( Group( pp ) ) called from
PolyID( pp ) called from
...
Entering break read-eval-print loop ...
you can 'quit;' to quit to outer loop, or
you can 'return;' to continue
brk_02>

However, the bizarre thing is that if I put the generators into a new
GAP process, everything works ok :

gap> $)(21,23)(22,
>    
24)(25,27)(26,28)(29,31)(30,32)(33,35)(34,36)(37,39)(38,40)(41,43)(42,
>    
44)(45,91)(46,92)(47,89)(48,90)(49,95)(50,96)(51,93)(52,94)(53,99)(54,
>    
100)(55,97)(56,98)(57,103)(58,104)(59,101)(60,102)(61,107)(62,108)(63,
> $)(72,
> $)(81,
>     127)(82,128)(83,125)(84,126)(85,131)(86,132)(87,129)(88,130),
> $)(19,
>    
40)(20,39)(21,33)(22,34)(23,36)(24,35)(25,29)(26,30)(27,32)(28,31)(45,
>    
53)(46,54)(47,56)(48,55)(51,52)(57,85)(58,86)(59,88)(60,87)(61,81)(62,
>    
82)(63,84)(64,83)(65,77)(66,78)(67,80)(68,79)(69,73)(70,74)(71,76)(72,
>    
75)(89,97)(90,98)(91,100)(92,99)(95,96)(101,129)(102,130)(103,132)(104,
> $(112,
>     123)(113,117)(114,118)(115,120)(116,119),
>  
(1,5)(2,8)(3,7)(4,6)(9,41)(10,44)(11,43)(12,42)(13,37)(14,40)(15,39)(16,
>    
38)(17,33)(18,36)(19,35)(20,34)(21,29)(22,32)(23,31)(24,30)(26,28)(45,
>    
49)(46,52)(47,51)(48,50)(53,85)(54,88)(55,87)(56,86)(57,81)(58,84)(59,
>    
83)(60,82)(61,77)(62,80)(63,79)(64,78)(65,73)(66,76)(67,75)(68,74)(70,
>    
72)(89,93)(90,96)(91,95)(92,94)(97,129)(98,132)(99,131)(100,130)(101,
> $(109,
>     117)(110,120)(111,119)(112,118)(114,116) ];
[
(1,3)(2,4)(5,7)(6,8)(9,11)(10,12)(13,15)(14,16)(17,19)(18,20)(21,23)(22,

24)(25,27)(26,28)(29,31)(30,32)(33,35)(34,36)(37,39)(38,40)(41,43)(42,

44)(45,91)(46,92)(47,89)(48,90)(49,95)(50,96)(51,93)(52,94)(53,99)(54,

100)(55,97)(56,98)(57,103)(58,104)(59,101)(60,102)(61,107)(62,108)(63,

105)(64,106)(65,111)(66,112)(67,109)(68,110)(69,115)(70,116)(71,113)(72,

114)(73,119)(74,120)(75,117)(76,118)(77,123)(78,124)(79,121)(80,122)(81,
    127)(82,128)(83,125)(84,126)(85,131)(86,132)(87,129)(88,130),

(1,9)(2,10)(3,12)(4,11)(7,8)(13,41)(14,42)(15,44)(16,43)(17,37)(18,38)(19,

40)(20,39)(21,33)(22,34)(23,36)(24,35)(25,29)(26,30)(27,32)(28,31)(45,

53)(46,54)(47,56)(48,55)(51,52)(57,85)(58,86)(59,88)(60,87)(61,81)(62,

82)(63,84)(64,83)(65,77)(66,78)(67,80)(68,79)(69,73)(70,74)(71,76)(72,

75)(89,97)(90,98)(91,100)(92,99)(95,96)(101,129)(102,130)(103,132)(104,

131)(105,125)(106,126)(107,128)(108,127)(109,121)(110,122)(111,124)(112,
    123)(113,117)(114,118)(115,120)(116,119),

(1,5)(2,8)(3,7)(4,6)(9,41)(10,44)(11,43)(12,42)(13,37)(14,40)(15,39)(16,

38)(17,33)(18,36)(19,35)(20,34)(21,29)(22,32)(23,31)(24,30)(26,28)(45,

49)(46,52)(47,51)(48,50)(53,85)(54,88)(55,87)(56,86)(57,81)(58,84)(59,

83)(60,82)(61,77)(62,80)(63,79)(64,78)(65,73)(66,76)(67,75)(68,74)(70,

72)(89,93)(90,96)(91,95)(92,94)(97,129)(98,132)(99,131)(100,130)(101,

125)(102,128)(103,127)(104,126)(105,121)(106,124)(107,123)(108,122)(109,
    117)(110,120)(111,119)(112,118)(114,116) ]
gap> IdGroup(Group(pp));
[ 528, 162 ]
gap>

This is Gap 4.3fix5 under Windows. However, I have had IdGroup crash
under similar circumstances in Gap 4.4.3 under Linux.

Any ideas what I should do?  How can I email the group to
Hans-Ulrich.Besche ?

Yours, Mike H...

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BEGIN:VCARD
VERSION:2.1
X-GWTYPE:USER
FN:Michael Hartley
ORG:University of Nottingham;Computer Science and IT
EMAIL;WORK;PREF;NGW:Michael.Hartley at nottingham.edu.my
N:Hartley;Michael
END:VCARD