Data Warehouse export contains values exceeding 255 bytes due to escape sequences

Last update: Thu Feb 19 2026 00:00:00 GMT+0000 (Coordinated Universal Time)

When exporting data from Adobe Analytics Data Warehouse, some fields contain values that exceed the 255-byte limit. The issue happens because special characters are escaped with additional backslashes, which increases the total byte size. This behavior affects downstream systems that expect fixed-length fields and can result in processing failures.

To fix this, review exported fields, remove or sanitize special characters in source data, or implement truncation logic on the receiving system.

Description description

Environment

Adobe Analytics
Data Warehouse

Issue/Symptoms

Data exported from Data Warehouse includes field values longer than 255 bytes.
Exported values contain escape sequences (such as double backslashes) for special characters, which increases length.
Downstream systems that enforce a 255-byte limit encounter errors when processing these fields.

Resolution resolution

To fix this issue, follow these steps:

Identify which fields in the exported .txt or .csv files generated by your Data Warehouse request contain values exceeding 255 bytes.
Review these fields for escape sequences such as double backslashes added before special characters.
Check Adobe Analytics documentation for reserved and special characters that are escaped during export.
Remove special characters such as tabs, newlines, and backslashes from the source data before sending it to Adobe Analytics.
If cleaning the source data isn’t possible, implement logic on the receiving system to detect and truncate values that exceed 255 bytes after escape sequences are applied.
Verify that subsequent exports no longer produce field values longer than 255 bytes.