# Error: calculate Question in a group, cause ArrayIndexOutBoundsException **URL:** \ **Category:** Support\ **Created:** [August 14, 2013, 5:10pm UTC](https://forum.getodk.org/t/error-calculate-question-in-a-group-cause-arrayindexoutboundsexception/2489 "2013-08-14T17:10:52Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Mitch\_S](https://getodk.b-cdn.net/letter_avatar_proxy/v4/letter/m/3ec8ea/32.png) [@Mitch\_S](https://forum.getodk.org/u/Mitch_S)\ **Post date:** [August 19, 2013, 5:08pm UTC](https://forum.getodk.org/t/error-calculate-question-in-a-group-cause-arrayindexoutboundsexception/2489/2 "2013-08-19T17:08:36Z")
The form with the error causes a failure in ODK Validate, so it is not surprising that it causes a problem on ODK Collect. Running it through the online XLSForm, it produces: Error: ODK Validate Errors: Group has no children! Group: ${gH}. The XML is invalid. \>\> Xform is invalid! See above for errors and warnings. > **ยทยทยท** > > On Wed, Aug 14, 2013 at 10:10 AM, Ramon de la Cruz Lazaro \< rmdlazaro@gmail.com\> wrote: > > > However when you add a note in the group, the error disappears (see > > calculate\_group\_noerror.xls) > > > > Ramon > > > > ## -- > > > > Post: [opendatakit@googlegroups.com](mailto:opendatakit@googlegroups.com) > > Unsubscribe: [opendatakit+unsubscribe@googlegroups.com](mailto:opendatakit+unsubscribe@googlegroups.com) > > Options: [http://groups.google.com/group/opendatakit?hl=en](http://groups.google.com/group/opendatakit?hl=en) > > > > * * * > > > > You received this message because you are subscribed to the Google Groups > > "ODK Community" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [opendatakit+unsubscribe@googlegroups.com](mailto:opendatakit+unsubscribe@googlegroups.com). > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). > > -- > Mitch Sundt > Software Engineer > University of Washington > [mitchellsundt@gmail.com](mailto:mitchellsundt@gmail.com) --- _[View the full topic](https://forum.getodk.org/t/error-calculate-question-in-a-group-cause-arrayindexoutboundsexception/2489)._