Release Notes
Abstract
Informix provides periodic fixes for the 12.10/4.10 releases. The following list is the most recent report of defect fixes for customer-reported defects in the Informix Server 12.10.xC16W6 and Informix Client SDK 4.10.xC16W6 releases. This report combines both Windows and UNIX-specific defect fixes.
Content
Fix Pack 12.10.xC16W6/4.10.xC16W6
Fix release date: 24 Feb 2026
Download: IBM Fix Central
| KI ID | Known Issue Abstract |
| IT47135 | INDEX OPERATIONS ON A COMPRESSED INDEX/TABLE IN COMBINATION WITH READAHEAD CAN CAUSE MEMORY ISSUES |
| IT47092 | CDR CHECK REPLICATE' ... '--REPAIR' IS NOT REPAIRING ALL ROWS |
| IT47084 | QUERY ON A FRAGMENTED TABLE IS CHOOSING THE SEQUENTIAL SCAN VS INDEX SCAN DUE TO OVERFLOW IN COUNTING TOTAL PAGES IN OPTIMIZER |
| IT46413 | SESSION HANG OR ASSERT FAILURE MAY OCCUR IF INSUFFICIENT RESOURCES AVAILABLE WHILST CREATING THREADS FOR PARALLEL INDEX BUILD |
| IT45259 | MIX OF DELETE/SELECT USING MULTI-INDEX SCANS CAN CAUSE IS_EMPTY(&CB->RMCB_RESULT_BUF) MESSAGES |
| IT43653 | VAGUE EXTENT CHECKING ERROR AND EMPTY CHUNK OR DBSPACE "NOT EMPTY" BECAUSE ADMIN API ALLOWS CHUNK SIZE UNALIGNED WITH PAGE SIZE |
| IT42532 | ONCHECK -PE OR -CE MIGHT REPORT SMART BLOB ERRORS WHEN RUN ON A HDR / RRS SECONDARY |
| IT41510 | NEXT EXECUTION VALUE (TK_NEXT_EXECUTION) MIGHT NOT USE TK_START_TIME WHEN BEING CALCULATED |
| IT36530 | ER GROUPER MEMORY LEAK WITH DISCREPANCY BETWEEN TABLES' REAL SCHEMA AND ER'S MASTER SCHEMA |
| DT454571 | When updating a page with outstanding in place alters after ALTER TABLE from char to varchar, errors with 'bfcheck bad page pg_frptr <size> < sizeof(ifx_page_t) 24 or > slotbeg <size>'. |
| DT438106 | The DBMS_LOB_SUBSTR function randomly displays garbage characters. |
| DT436661 | RSS_Recv thread on RSS server can assert while submitting the readahead request. |
| DT435915 | Windows: An ontape backup will hang after completion if the total number of characters for the names of the dbspaces is too large. |
| DT426753 | Assert Failed: Dropping wrong TBLSpace, requested 14904545 != actual 14904544. |
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Document Information
Modified date:
22 September 2026
UID
ibm17288891