**Cause** |**Solution**

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You are using a single expression, but are encasing them in curly brackets`{folderName/**}` | Do not encase them in in curly brackets. Instead use`folderName/**`<br><br>Curly brackets are only used for multiple expressions.

Incorrect syntax for negation expressions | Proper syntax:`!folderName/**` for a single path,`!{folderName/**,folder2Name/**}` for multiple expressions

Incorrect syntax for negation expressions | Proper syntax:`!folderName/**` for a single path,`!{folderName/**,folder2Name/**}` for multiple expressions. To match all files in a directory except for a specific pattern, use syntax`folderName/!(fileToIgnore)**`.

Changed files are in hidden directories | Glob expressions will not match for hidden directories unless the directory pattern explicitly starts with`.`.<br><br>For example, to match for all files in all hidden subdirectories immediately under`folderName`, use`folderName/.*/**`.<br><br>Note that you will need an additional expression if you want to also match normal subdirectories under`folderName`.

List of actual changed files is different than expected | Review the full webhook event payload either in[Codefresh trigger audit logs](https://g.codefresh.io/account-admin/audit/audit-triggers), or in your git provider's webhook event history. The payload will contain the full list of modified files for the specific event, exactly as given by your git provider.

Incorrect glob expression | You can[check your glob expressions with a tool](https://www.digitalocean.com/community/tools/glob) to ensure the syntax matches the correct files.