## Custom Data Fields
All Custom Data fields (`
customData1` to `
customData30`) are limited to a maximum length of 160 characters.
URLs like `
progressiveUrl` are limited to a maximum of 300 bytes but to avoid simply truncating the URL if the URL overflows 300 bytes the query parameters and URL fragments (`
?foo=bar` and `
#anchor` parts) will be cut away to bring the URL below the limit.
## Error Messages and Error Data
Error messages (the field `
ERROR_MESSAGE`) will be truncated to a maximum length of 250 bytes
Detailed error data (the field `
ERROR_DATA`) is being truncated to a maximum length of 500 bytes.
To indicate that the error message was truncated an ellipsis will be appended (`
## Network Explorer and Error Detail
Network explorer stack trace data data is limited in length to a maximum of 50 lines of stack trace.