SQL/MX 2.3.x to SQL/MX 3.0 Database and Application Migration Guide (H06.22+, J06.11+)

Considerations for upgrading to SQL/MX Release
3.0
HP NonStop SQL/MX 2.3.x to SQL/MX 3.0 Database and Application Migration Guide666210-002
2-14
Recommendations for Migrating to SQL/MX Release
3.x
Do not change the access mode of a read-only transaction to read-
write and then perform WRITE operations.
Commit the read-only transaction before changing the access mode to
read-write and then perform WRITE operations.