Error, Could not open output of external Knuth-Bendix program

[Tiasa]

The following GAP snippet is terminating prematurely with the above error (see details below):
`LoadPackage("kbmag");
verbose := false;
SetInfoLevel(InfoRWS,2);
conf_kb_order := "recursive";
KB_max := 2000;

F := FreeGroup("x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17");

AssignGeneratorVariables(F);

K36_relations := [x0x1x0^-1x1^-1, x0x2x0^-1x2^-1, x0x3x0^-1x3^-1, x0x4x0^-1x4^-1, x0x5x0^-1x5^-1, x1x0x1^-1x0^-1, x1x2x1^-1x2^-1, x1x3x1^-1x3^-1, x1x4x1^-1x4^-1, x1x5x1^-1x5^-1, x2x0x2^-1x0^-1, x2x1x2^-1x1^-1, x2x3x2^-1x3^-1, x2x4x2^-1x4^-1, x2x5x2^-1x5^-1, x3x0x3^-1x0^-1, x3x1x3^-1x1^-1, x3x2x3^-1x2^-1, x3x4x3^-1x4^-1, x3x5x3^-1x5^-1, x4x0x4^-1x0^-1, x4x1x4^-1x1^-1, x4x2x4^-1x2^-1, x4x3x4^-1x3^-1, x4x5x4^-1x5^-1, x5x0x5^-1x0^-1, x5x1x5^-1x1^-1, x5x2x5^-1x2^-1, x5x3x5^-1x3^-1, x5x4x5^-1x4^-1, x6x7x6^-1x7^-1, x6x8x6^-1x8^-1, x6x9x6^-1x9^-1, x6x10x6^-1x10^-1, x6x11x6^-1x11^-1, x7x6x7^-1x6^-1, x7x8x7^-1x8^-1, x7x9x7^-1x9^-1, x7x10x7^-1x10^-1, x7x11x7^-1x11^-1, x8x6x8^-1x6^-1, x8x7x8^-1x7^-1, x8x9x8^-1x9^-1, x8x10x8^-1x10^-1, x8x11x8^-1x11^-1, x9x6x9^-1x6^-1, x9x7x9^-1x7^-1, x9x8x9^-1x8^-1, x9x10x9^-1x10^-1, x9x11x9^-1x11^-1, x10x6x10^-1x6^-1, x10x7x10^-1x7^-1, x10x8x10^-1x8^-1, x10x9x10^-1x9^-1, x10x11x10^-1x11^-1, x11x6x11^-1x6^-1, x11x7x11^-1x7^-1, x11x8x11^-1x8^-1, x11x9x11^-1x9^-1, x11x10x11^-1x10^-1, x12x13x12^-1x13^-1, x12x14x12^-1x14^-1, x12x15x12^-1x15^-1, x12x16x12^-1x16^-1, x12x17x12^-1x17^-1, x13x12x13^-1x12^-1, x13x14x13^-1x14^-1, x13x15x13^-1x15^-1, x13x16x13^-1x16^-1, x13x17x13^-1x17^-1, x14x12x14^-1x12^-1, x14x13x14^-1x13^-1, x14x15x14^-1x15^-1, x14x16x14^-1x16^-1, x14x17x14^-1x17^-1, x15x12x15^-1x12^-1, x15x13x15^-1x13^-1, x15x14x15^-1x14^-1, x15x16x15^-1x16^-1, x15x17x15^-1x17^-1, x16x12x16^-1x12^-1, x16x13x16^-1x13^-1, x16x14x16^-1x14^-1, x16x15x16^-1x15^-1, x16x17x16^-1x17^-1, x17x12x17^-1x12^-1, x17x13x17^-1x13^-1, x17x14x17^-1x14^-1, x17x15x17^-1x15^-1, x17x16x17^-1x16^-1, x0x6x0^-1x6^-1, x0x12x0^-1x12^-1, x6x0x6^-1x0^-1, x6x12x6^-1x12^-1, x12x0x12^-1x0^-1, x12x6x12^-1x6^-1, x1x7x1^-1x7^-1, x1x13x1^-1x13^-1, x7x1x7^-1x1^-1, x7x13x7^-1x13^-1, x13x1x13^-1x1^-1, x13x7x13^-1x7^-1, x2x8x2^-1x8^-1, x2x14x2^-1x14^-1, x8x2x8^-1x2^-1, x8x14x8^-1x14^-1, x14x2x14^-1x2^-1, x14x8x14^-1x8^-1, x3x9x3^-1x9^-1, x3x15x3^-1x15^-1, x9x3x9^-1x3^-1, x9x15x9^-1x15^-1, x15x3x15^-1x3^-1, x15x9x15^-1x9^-1, x4x10x4^-1x10^-1, x4x16x4^-1x16^-1, x10x4x10^-1x4^-1, x10x16x10^-1x16^-1, x16x4x16^-1x4^-1, x16x10x16^-1x10^-1, x5x11x5^-1x11^-1, x5x17x5^-1x17^-1, x11x5x11^-1x5^-1, x11x17x11^-1x17^-1, x17x5x17^-1x5^-1, x17x11x17^-1x11^-1, x0^2, x1^2, x2^2, x3^2, x4^2, x5^2, x6^2, x7^2, x8^2, x9^2, x10^2, x11^2, x12^2, x13^2, x14^2, x15^2, x16^2, x17^2, x0x1x2x3x4x5, x6x7x8x9x10x11, x12x13x14x15x16x17, x0x6x12, x1x7x13, x2x8x14, x3x9x15, x4x10x16, x5x11*x17];

K36_group := F/K36_relations;

K36_RWS := KBMAGRewritingSystem(K36_group);

shf_order := [ 12, 4, 11, 17, 13, 5, 1, 14, 6, 18, 2, 15, 9, 7, 3, 16, 10, 8 ];

SetOrderingOfKBMAGRewritingSystem(K36_RWS,"wreathprod", shf_order);

O := OptionsRecordOfKBMAGRewritingSystem(K36_RWS);
O.maxeqns:=3000;

MakeConfluent(K36_RWS);`

After running :

Error, Could not open output of external Knuth-Bendix program. at path-to/gap-4.12.2/pkg/kbmag/gap/rws4.g:614 called from
UpdateRWS( rws, _KBTmpFileName, true
); at path-to/gap-4.12.2/pkg/kbmag/gap/rws4.g:1534 called from
KBRWS( rws
) at path-to/gap-4.12.2/pkg/kbmag/gap/kbsmg2.gi:466

More info: I have the latest version of the kbmag package.