What does the EximSign CGM validator check?

It reads CMCHI01 HREC, TREC, consmaster and conshouse records, then checks field lengths, required values, MAWB check digit, HAWB format, duplicate houses, linkage, package totals and gross-weight differences.

Does the validator upload my CGM file permanently?

No. The file is read during the validation request and is not saved by this website.

Can this tool guarantee ICEGATE acceptance?

No. It is a pre-filing structural and arithmetic check. ICEGATE performs the final validation against its live registration, port, airline, filing and customs data.

What is the maximum HAWB length in CMCHI01?

The ICEGATE Customs-Airline/Consol Agent message format lists the HAWB field as alphanumeric with a maximum length of 20 characters.

How is the master-house weight difference checked?

The tool shows the exact KGS difference and percentage. The CMCHI01 acknowledgement list includes an error where the gross-weight difference between master and house levels is more or less than 10 percent.

Free pre-filing tool

Air CGM, MAWB and HAWB validator.

Select the original .cgm file or paste its content. The tool reads CMCHI01 master and house records and shows the exact field, length, package or weight issue on the same page.

What the file actually contains

CGM validates shipment records, not consignee documents

In the CMCHI01 structure, consmaster carries the MAWB-level record and conshouse carries each HAWB under that master. The attached type of file contains Consol Agent ID, Customs House Code, optional flight/IGM references, MAWB, HAWB, origin, destination, shipment type, packages, gross weight and item description.

It does not contain consignee name, address or IEC in these records. A page should therefore not claim that it can verify consignee IEC from this CGM file. Live registration, airline prefix and port validity remain ICEGATE-side checks.

Field limits

CMCHI01 values worth checking before signing

16Consol Agent ID/CARN: maximum 16 characters.
20MAWB and HAWB fields: maximum 20 characters. Standard MAWB numbers are normally 11 digits including the check digit.
3Origin and destination: 3-letter codes.
8Total packages: positive numeric value, up to 8 digits.
9.3Gross weight: KGS value with up to 9 digits and 3 decimals.
30Item description: mandatory, maximum 30 characters.

Matching logic

Why a clean MAWB is not enough

Every HAWB should point to the same MAWB, Consol Agent ID, Customs House Code and route used by the master record. The tool also detects duplicate HAWB numbers and compares house package and weight totals with the master declaration.

ICEGATE's published acknowledgement list includes errors for missing or invalid values, duplicate house detail, master packages being greater than house packages, and gross-weight difference above or below 10% between master and house levels.

Practical answers

Questions filing teams ask about CGM validation

Does exact package tally matter?

For a total shipment, treat a master-house package mismatch as a filing issue. For part or split shipments, review the filing context instead of forcing an artificial match.

Why show HAWB length separately?

CMCHI01 allows up to 20 characters. A visually similar house reference can cross that limit without the operator noticing it in a long text file.

What does the MAWB check digit test do?

For an 11-digit numeric MAWB, the tool checks the final digit against the seven-digit serial number modulo 7. It cannot confirm whether the airline prefix is currently registered.

Should the file be signed before this check?

No. Validate the source CGM first. Sign only the final corrected file, because editing a signed output can invalidate the signing handoff.

Air CGM, MAWB and HAWB validator.

CGM review

Issues and warnings

Header and control details

MAWB master record

HAWB house records

Master-house tally