# Field data being erroneously reported as "missing"

**URL:** <https://community.influxdata.com/t/field-data-being-erroneously-reported-as-missing/13299>\
**Category:** Telegraf\
**Tags:** kapacitor\
**Created:** [March 4, 2020, 4:53pm UTC](https://community.influxdata.com/t/field-data-being-erroneously-reported-as-missing/13299 "2020-03-04T16:53:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ruairinewman](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/ruairinewman/32/2429_2.png) [@ruairinewman](https://community.influxdata.com/u/ruairinewman)\
**Post date:** [March 4, 2020, 4:53pm UTC](https://community.influxdata.com/t/field-data-being-erroneously-reported-as-missing/13299/1 "2020-03-04T16:53:55Z")

</div>

Using the following snippet in a TICK script, I receive the error shown below in the kapacitor.log:

> var load5\_data = stream  
> |from()  
> .measurement(‘system’)  
> .groupBy(‘deployment’)  
> .where(lambda: isPresent(‘n\_cpus’))  
> .where(lambda: isPresent(‘load5’))  
> .where(lambda: isPresent(‘role’))  
> .where(lambda: “role” == ‘app’)  
> |log()  
> |eval(lambda: “load5” \> ((“load5”/float(“n\_cpus”)) \* 120.0))  
> .as(‘load5\_high’)  
> |eval(lambda: “load5” \< ((“load5”/float(“n\_cpus”)) \* 80.0))  
> .as(‘load5\_low’)

Error:

> ts=2020-03-04T16:44:53.028Z lvl=error msg=“error evaluating expression” service=kapacitor task\_master=main task=autoscaling\_v1 node=eval8 err=“Cannot call function "float" argument "n\_cpus" is missing, values in scope are ["load5"]”

However, as the following log snippet shows, the field “n\_cpus” exists, and has a value:

> ts=2020-03-04T16:44:52.967Z lvl=info msg=point service=kapacitor task\_master=main task=autoscaling\_v1 node=log6 prefix= name=system db=telegraf rp=default group=deployment=xxxxxx1500 dimension\_0=deployment tag\_env=qas tag\_host=xxxxxxapp1 tag\_region=us-east-1 tag\_role=coupa\_app tag\_zone=us-east-1f tag\_dc=aws tag\_deployment=xxxxxx1500 field\_load1=0 field\_load5=0.01 field\_load15=0.05 field\_n\_cpus=4 field\_n\_users=0 time=2020-03-04T16:44:39.700227858Z

Any assistance would be gratefully received.

Thanks!