What can we help you find? Products Coupa Product Documentation Supplier Resources For Suppliers Supplier Integration Resources Purchase Orders and Punchouts Error: Incorrect Header Check

Error: Incorrect Header Check

Symptom

Error: Incorrect Header Check

Environment

Release 12+, Microsoft Web Servers (IIS)

Solution

Supplier needs to send data in gzip compression format

Cause

Microsoft servers incorrectly deliver raw deflate for "Deflate" (i.e. RFC 1951 data without the zlib RFC 1950 wrapper) which Coupa cannot decompress.