| SIGMA_BLOCK_EXISTS | Block '$block' already exists | Tried to add a block with a name that is already present in the template | Choose a different name for a new block |
| SIGMA_PLACEHOLDER_NOT_FOUND | Variable placeholder '$placeholder' not found | There is no placeholder to replace by a new block in the template | Check the spelling of the placeholder name |
| SIGMA_PLACEHOLDER_DUPLICATE | Placeholder '$placeholder' should be unique, found in multiple blocks | A placeholder to be replaced by a new block should appear only in one place | Check the spelling of the placeholder name, choose a different placeholder |
| SIGMA_TPL_NOT_FOUND | Cannot read the template file '$filename' | File is unreadable for some reason | Check if the file exists and has correct permissions set |
| SIGMA_CACHE_ERROR | Cannot save template file 'filename' | A prepared template file cannot be saved | Check if the directory for prepared templates cache exists and is writeable for your script |
| SIGMA_BLOCK_DUPLICATE | The name of a block must be unique within a template. Block 'blockname' found twice. | The added file contains a block that has the same name as the existing one | Check the file and rename the block to something else |
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SIGMA_CALLBACK_SYNTAX_ERROR
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Cannot parse template function: (error description)
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Bogus syntax for template function parameters.
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Fix the template function definition, pay special attention to
quoting rules.
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