Auto Increment a Value

> How to Auto increment a value when a record is added in xforms
> i have tried following code but getting
> An empty sequence is not allowed as the first argument of instance()  
> exception
>
> <xforms:setvalue ref="instance(programs-instance)/program[id]"
>                       value="(instance(programs-instance)/
> program[id])+1"/>
>
> Thanks,
> Srikanth
>
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> How to Auto increment a value when a record is added in xforms i have
> tried following code but getting An empty sequence is not allowed as
> the first argument of instance() exception
>
> <xforms:setvalue ref="instance(programs-instance)/program[id]"
>                       value="(instance(programs-instance)/
> program[id])+1"/>
>
> Thanks,
> Srikanth
>
> --
> You receive this message as a subscriber of the [hidden email]
> mailing list.
> To unsubscribe: mailto:[hidden email]
> For general help: mailto:[hidden email]?subject=help
> OW2 mailing lists service home page: http://www.ow2.org/wws

> Erik,
> Failure converting untyped value to a number exception is thrown
> When I click on save button
> I want to increment the id value based on previous node id value.
> Thanks,
> Srikanth
>
> -----Original Message-----
> From: Erik Bruchez [mailto:[hidden email]]
> Sent: Friday, November 21, 2008 10:30 PM
> To: [hidden email]
> Subject: [ops-users] Re: Auto Increment a Value
>
> You are missing quotes around the name of your instance. Try:
>
> <xforms:setvalue ref="instance('programs-instance')/program[id]"
>   value="(instance('programs-instance')/program[id])+1"/>
>
> -Erik
>
> On Nov 21, 2008, at 12:01 AM, Srikanth A wrote:
>
>> How to Auto increment a value when a record is added in xforms i have
>> tried following code but getting An empty sequence is not allowed as
>> the first argument of instance() exception
>>
>> <xforms:setvalue ref="instance(programs-instance)/program[id]"
>>                      value="(instance(programs-instance)/
>> program[id])+1"/>
>>
>> Thanks,
>> Srikanth
>>
>> --
>> You receive this message as a subscriber of the [hidden email]
>> mailing list.
>> To unsubscribe: mailto:[hidden email]
>> For general help: mailto:[hidden email]?subject=help
>> OW2 mailing lists service home page: http://www.ow2.org/wws
>
> --
> Orbeon Forms - Web Forms for the Enterprise Done the Right Way
> http://www.orbeon.com/
>
>
>
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