Adding error messages for missing definitions

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (8a049d3) 0.00% compared to head (077903e) 0.00%.

:exclamation: Current head 077903e differs from pull request most recent head 85c22b3. Consider uploading reports for the commit 85c22b3 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #38 +/- ## ===================================== Coverage 0.00% 0.00% ===================================== Files 10 10 Lines 252 263 +11 ===================================== - Misses 252 263 +11 ``` | [Impacted Files](https://app.codecov.io/gh/IDEMSInternational/epicsawrap/pull/38?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=IDEMSInternational) | Coverage Δ | | |---|---|---| | [R/annual\_rainfall\_summaries.R](https://app.codecov.io/gh/IDEMSInternational/epicsawrap/pull/38?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=IDEMSInternational#diff-Ui9hbm51YWxfcmFpbmZhbGxfc3VtbWFyaWVzLlI=) | `0.00% <0.00%> (ø)` | | | [R/crop\_success\_probabilities.R](https://app.codecov.io/gh/IDEMSInternational/epicsawrap/pull/38?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=IDEMSInternational#diff-Ui9jcm9wX3N1Y2Nlc3NfcHJvYmFiaWxpdGllcy5S) | `0.00% <0.00%> (ø)` | | | [R/monthly\_temperature\_summaries.R](https://app.codecov.io/gh/IDEMSInternational/epicsawrap/pull/38?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=IDEMSInternational#diff-Ui9tb250aGx5X3RlbXBlcmF0dXJlX3N1bW1hcmllcy5S) | `0.00% <ø> (ø)` | | | [R/season\_start\_probabilities.R](https://app.codecov.io/gh/IDEMSInternational/epicsawrap/pull/38?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=IDEMSInternational#diff-Ui9zZWFzb25fc3RhcnRfcHJvYmFiaWxpdGllcy5S) | `0.00% <0.00%> (ø)` | | | [R/total\_temperature\_summaries.R](https://app.codecov.io/gh/IDEMSInternational/epicsawrap/pull/38?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=IDEMSInternational#diff-Ui90b3RhbF90ZW1wZXJhdHVyZV9zdW1tYXJpZXMuUg==) | `0.00% <0.00%> (ø)` | |

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