> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/OfflineConversionError).

Possible errors for offline conversion client summary.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/resources/offline_conversion_upload_client_summary.proto)

| Fields ||
|---|---|
| ## `error_code` Union field. Error with description. `error_code` can be only one of the following: ||
| ### `collection_size_error` | `CollectionSizeError` Output only. Collection size error. |
| ### `conversion_adjustment_upload_error` | `ConversionAdjustmentUploadError` Output only. Conversion adjustment upload error. |
| ### `conversion_upload_error` | `ConversionUploadError` Output only. Conversion upload error. |
| ### `date_error` | `DateError` Output only. Date error. |
| ### `distinct_error` | `DistinctError` Output only. Distinct error. |
| ### `field_error` | `FieldError` Output only. Field error. |
| ### `mutate_error` | `MutateError` Output only. Mutate error. |
| ### `not_allowlisted_error` | `NotAllowlistedError` Output only. Not allowlisted error. |
| ### `string_format_error` | `StringFormatError` Output only. String format error. |
| ### `string_length_error` | `StringLengthError` Output only. String length error. |