FEATURE OrCAD_PSpice_A/D cdslmd 10.5 31-dec-2025 10 DUP_GROUP=UH SUPERSEDE ISSUER="Cadence" SIGN=CDEF12345678AB The OrCAD 10.5 license file is a classic FLEXlm license.dat — a structured text file combining server binding, vendor daemon configuration, and cryptographically signed feature lines. It reflects a transitional period in EDA licensing, moving from dongles toward network-managed floating licenses. While obsolete today, understanding its anatomy is essential for anyone maintaining legacy design environments or recovering old PCB projects.

| Type | File Name Example | Purpose | |------|------------------|---------| | | license.dat | Fixed to one computer’s hostname/MAC address | | Floating (network) | license.dat | Served by a license server to many clients | | Evaluation | license_eval.dat | Time-limited, often feature-limited |

LM_LICENSE_FILE = C:\OrCAD\license.dat CDS_LIC_FILE = C:\OrCAD\license.dat CDS_LIC_FILE was Cadence’s override variable. Many admins set both for safety. The license file would contain one or more of these features (product names):

A “full” license file would have all these lines, each with its own seat count and signature. For a single user, a node-locked license.dat looked simpler — no SERVER line, just: