When I insert i-sprocket.ipt as is, it works okay.
I tried to change the number of teeth to 48 and received:
[WARNING] Part2: Errors occurred during update <DcKernelRes(213)> [r:\core\Rd\Main\Component.cpp, line 329]
[WARNING] i-Sprocket.ipt: Errors occurred during update <DcKernelRes(213)> [r:\core\Rd\Main\Component.cpp, line 329]
[ERROR] Sprocket Blank: Could not build this Revolution <DcKernelRes(205)> [r:\core\Rd\Main\Feature.cpp, line 176]
[ERROR] A profile loop could not be repaired after sketch geometry was edited or deleted. Use Edit Feature to reselect the profile. <RdRes(818)> [r:\core\Rd\Main\RdDiagnoses.cpp, line 1771]
[ERROR] Sketch2: Could not build this Sketch <DcKernelRes(205)> [r:\core\Rd\Main\sketch.cpp, line 507]
[WARNING] Coincident constraint to reference geometry that could not be resolved. Use Edit Sketch to delete the reference geometry and rebuild the constraint. <RdRes(369)> [r:\core\Rd\Main\RdDiagnoses.cpp, line 2216]
[ERROR] Tooth Profile: Could not build this Extrusion <DcKernelRes(205)> [r:\core\Rd\Main\Feature.cpp, line 176]
[ERROR] Cannot cut/intersect an empty part. Use Edit Feature to change the feature definition or Reorder the feature. <RdRes(843)> [r:\core\Rd\Main\Extrusion.cpp, line 2095]
[ERROR] Sketch4: Could not build this Sketch <DcKernelRes(205)> [r:\core\Rd\Main\sketch.cpp, line 507]
[ERROR] Circular Pattern1: Could not build this Circular Pattern <DcKernelRes(205)> [r:\core\Rd\Main\Pattern.cpp, line 2242]
[ERROR] All features involved in the pattern failed to execute; stopping pattern execution. Fix the problems for the input features. <RdRes(836)> [r:\core\Rd\Main\PatternUtil.cpp, line 652]
[ERROR] Sketch3: Could not build this Sketch <DcKernelRes(205)> [r:\core\Rd\Main\sketch.cpp, line 507]
[WARNING] Coincident constraint to reference geometry that could not be resolved. Use Edit Sketch to delete the reference geometry and rebuild the constraint. <RdRes(369)> [r:\core\Rd\Main\RdDiagnoses.cpp, line 2216]
[ERROR] Hub Extrusion: Could not build this Extrusion <DcKernelRes(205)> [r:\core\Rd\Main\Feature.cpp, line 176]
[ERROR] Shaft Bore: Could not build this Extrusion <DcKernelRes(205)> [r:\core\Rd\Main\Feature.cpp, line 176]
[ERROR] Cannot cut/intersect an empty part. Use Edit Feature to change the feature definition or Reorder the feature. <RdRes(843)> [r:\core\Rd\Main\Extrusion.cpp, line 2095]
[ERROR] Sketch5: Could not build this Sketch <DcKernelRes(205)> [r:\core\Rd\Main\sketch.cpp, line 507]
[WARNING] Dimension to reference geometry that could not be resolved. Use Edit Sketch to delete the reference geometry and rebuild the dimension. <RdRes(367)> [r:\core\rd\rddiagnoses.h, line 653]
[WARNING] Coincident constraint to reference geometry that could not be resolved. Use Edit Sketch to delete the reference geometry and rebuild the constraint. <RdRes(369)> [r:\core\Rd\Main\RdDiagnoses.cpp, line 2216]
[WARNING] Coincident constraint to reference geometry that could not be resolved. Use Edit Sketch to delete the reference geometry and rebuild the constraint. <RdRes(369)> [r:\core\Rd\Main\RdDiagnoses.cpp, line 2216]
[ERROR] Keyway: Could not build this Extrusion <DcKernelRes(205)> [r:\core\Rd\Main\Feature.cpp, line 176]
[ERROR] Cannot cut/intersect an empty part. Use Edit Feature to change the feature definition or Reorder the feature. <RdRes(843)> [r:\core\Rd\Main\Extrusion.cpp, line 2095]
[ERROR] Chamfer Edges: Could not build this Chamfer <DcKernelRes(205)> [r:\core\Rd\Main\Feature.cpp, line 176]
[ERROR] null pointer to entity given <Acis(4124)> [r:\core\Mi\helpers.cpp, line 359]
[ERROR] Failed to save factory member <UcRes.dll(846)> [r:\Application\Uc\Request\UCxSetToMemberReq.cpp, line 730]
:-)