# Opal error : better description for missing functions. please

**URL:** <https://datashield.discourse.group/t/opal-error-better-description-for-missing-functions-please/355>\
**Category:** Developer support\
**Created:** [29 January 2021 16:43 UTC](https://datashield.discourse.group/t/opal-error-better-description-for-missing-functions-please/355 "2021-01-29T16:43:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![patricia.ryser-welch](https://avatars.discourse-cdn.com/v4/letter/p/a6a055/32.png) [@patricia.ryser-welch](https://datashield.discourse.group/u/patricia.ryser-welch)\
**Post date:** [29 January 2021 16:43 UTC](https://datashield.discourse.group/t/opal-error-better-description-for-missing-functions-please/355/1 "2021-01-29T16:43:58Z")

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Hi,

After 1 hour of trying everything, I have noticed datashield.error was throwing NA. It was was “so clear”. It was my last try to check the opal server had the correct list of functions from the DESCRIPTION file. Would it be more developer friendly, if the next version of DSI returns a much more friendlier error; i.e., _you are calling a function that does not exist yet on the opal server_.

Thank you.

P.