Unable to filter casedb based on user property

Dear CommCare Users,

Why would this piece of code fail to work?:
You currently have <output value="count(instance('casedb')/casedb/case[@case_type
= 'care_group'][health_facility = ])" /> Care Groups. Are you sure you want to add another one?

Every time I try to save, I get this error:

https://lh3.googleusercontent.com/-701RNHCBOsk/WdKfhS9nljI/AAAAAAAACVM/SJfaT8Kce3QeUL1wN524d1Ucptgiq6e-wCLcBGAs/s1600/xml_error.PNG

Any help?
Thanks and kind regards,
Chaiwa.

https://lh3.googleusercontent.com/-701RNHCBOsk/WdKfhS9nljI/AAAAAAAACVM/SJfaT8Kce3QeUL1wN524d1Ucptgiq6e-wCLcBGAs/s1600/xml_error.PNG
https://lh3.googleusercontent.com/-701RNHCBOsk/WdKfhS9nljI/AAAAAAAACVM/SJfaT8Kce3QeUL1wN524d1Ucptgiq6e-wCLcBGAs/s1600/xml_error.PNG

Chaiwa,

When you're writing an XPath expression you no longer use the syntax - you can reference the value directly. So, try
(pseudocode):

Cheers,
Will

ยทยทยท On Mon, Oct 2, 2017 at 4:24 PM, Chaiwa Berian wrote:

Dear CommCare Users,

Why would this piece of code fail to work?:
You currently have <output value="count(instance('casedb')/casedb/case[@case_type
= 'care_group'][health_facility = ])" /> Care Groups. Are you sure you want to add another one?

Every time I try to save, I get this error:

https://lh3.googleusercontent.com/-701RNHCBOsk/WdKfhS9nljI/AAAAAAAACVM/SJfaT8Kce3QeUL1wN524d1Ucptgiq6e-wCLcBGAs/s1600/xml_error.PNG

Any help?
Thanks and kind regards,
Chaiwa.

https://lh3.googleusercontent.com/-701RNHCBOsk/WdKfhS9nljI/AAAAAAAACVM/SJfaT8Kce3QeUL1wN524d1Ucptgiq6e-wCLcBGAs/s1600/xml_error.PNG

https://lh3.googleusercontent.com/-701RNHCBOsk/WdKfhS9nljI/AAAAAAAACVM/SJfaT8Kce3QeUL1wN524d1Ucptgiq6e-wCLcBGAs/s1600/xml_error.PNG

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