Issue when attempting to scale model

**Original report ([archived issue](https://osrf-migration.github.io/sdformat-gh-pages/#!/osrf/sdformat/issues/165)) by Anonymous.**

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When I attempt to use the tag in the file it simply spits back that
```
XML Element[scale], child of element[model] not defined in SDF. Ignoring[scale]. You may have an incorrect SDF file, or an sdformat version that doesn't support this element.
```
I put the scale tag under model [as is said here](http://sdformat.org/spec?ver=1.6&elem=state#model_scale). Can anyone advise? Thanks

Start by comparing the reported XML Element[scale] error with the SDF 1.6 model_scale specification linked in the report, then identify which sdformat version is being used and whether model-level scale is supported there. Done means establishing whether this is a parser compatibility bug or an incorrect version/documentation reference, with a reproducible result.

Written by the indexing model from the issue text.