Internal Error: Sub-system: ASMDB, File: /quartus/db/asmdb/asmdb_param.cpp, Line: 522 iter != m_enum_map-&gt

Description

For designs that target an Arria V, Cyclone V, or Stratix V device, if you create an I/O node with and ECO change in the Chip Planner, a subsequent Check and Save All Netlist Changes operation fails with the error

Internal Error: Sub-system: ASMDB, File: /quartus/db/asmdb/asmdb_param.cpp, Line: 522 iter != m_enum_map-&gt

Resolution

For affected device families, I/O node creation with ECOs is not supported by the Quartus II software version 12.0.

This issue is corrected in the Quartus II software version 12.0 SP1.