# See "internal error" and "field values unsupported" error for flux query

**URL:** <https://community.influxdata.com/t/see-internal-error-and-field-values-unsupported-error-for-flux-query/23197>\
**Category:** InfluxDB 2\
**Tags:** flux\
**Created:** [January 3, 2022, 10:43am UTC](https://community.influxdata.com/t/see-internal-error-and-field-values-unsupported-error-for-flux-query/23197 "2022-01-03T10:43:54Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![wfjm](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/wfjm/32/5245_2.png) [@wfjm](https://community.influxdata.com/u/wfjm)\
**Post date:** [January 3, 2022, 10:43am UTC](https://community.influxdata.com/t/see-internal-error-and-field-values-unsupported-error-for-flux-query/23197/1 "2022-01-03T10:43:54Z")

</div>

I’m using InfluxDB 2.1.1Server: `657e183` Frontend: `cc65325` under Debian 11 `bullseye`.  
I was casing some data outliers, so setup a filter and wanted the list of host sending such data with

```auto
from(bucket: "dca")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r._measurement == "Cri1I2cLtc2991")
  |> filter(fn: (r) => r._field == "fpga_t")
  |> filter(fn: (r) => r._value != 0.0)
  |> keep(columns: ["host"])
  |> group()
  |> distinct(column: "host")

```

This query returns with

```auto
An internal error has occurred - check server logs

```

and in the server logs I see

```auto
  2022-01-02T17:09:49.374122+01:00 cbmin00x influxd-systemd-start.sh[765198]:
    ts=2022-01-02T16:09:49.373311Z lvl=warn
    msg="internal error not returned to client"
    log_id=0Yh4S3MW000
    handler=error_logger error="field values unsupported"

```

When I remove the `distinct` filter at the end the query works !  
Also when I change `r._value != 0.0` to `r._value != +0.0` or `r._value != -0.0` !

```auto
from(bucket: "dca")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r._measurement == "Cri1I2cLtc2991")
  |> filter(fn: (r) => r._field == "fpga_t")
  |> filter(fn: (r) => r._value != +0.0)
  |> keep(columns: ["host"])
  |> group()
  |> distinct(column: "host")

```

works, the only difference is the `+` in front of the `0.0` floating literal. A `-` works as well.

I’m really puzzled here ! How comes that

- a minor detail of a floating point literal makes such a difference
- that I get a “`server error`” at all (I’d assume that happens when assertions fail)

Any hint highly welcome.