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Erik Stahlhut

CURSOR Service Distribution

Latest News: NSI changes to CURSOR-XPS

We have combined our service and support capabilities for high-performance databases with the system-oriented tool development of Nonne & Schneider.

Starting July 4th, 2024, you can find us under one roof: CURSOR Expert Solutions GmbH.

CURSOR Expert Solutions will seamlessly continue all business activities of Nonne & Schneider, but will also take over the development of the CURSOR Admin-Scout. Our extensive portfolio of services and support will in future be offered via CURSOR Expert Solutions.

This consolidates our expertise in Solution Management, both personnel-wise and organizationally, at one location. The executive board will be expanded with Erik Stahlhut, and „XPS“ will remain as a subsidiary within the CURSOR Software AG group in Giessen.

For customers and partners of CURSOR Service Distribution, initially, little will change. All active contracts and agreements remain valid. Your points of contact do not change.

All service offerings available on our website will continue to be available.
The contact details remain the same, just get in touch with us.


Monitoring Monitoring


  • Companies with existentially important databases trust in our Informix Monitoring. We prevent system failures before they occur.

  • Automated monitoring around the clock. Early detection of bottlenecks based on history data with our CURSOR Admin-Scout.

  • Administration for all installation sizes. Standard, remote or standby administration, up to 24x7 availability for systems with high availability.

  • Individual adjustments to the service levels of our customers with short response times and personal contact persons in support.

Discover more about Informix Monitoring with the CURSOR Service Distribution!



  • Requirements from all areas of data management. Service packages or individually agreed projects like:
    • Setup of replications or high availability systems;
    • Performance, runtime analysis, tuning;
    • Release, platform or cloud migration;
    • Access control, encryption, archiving.
  • CURSOR Service Distribution is a long-standing IBM High-Value Service Provider for IBM Informix.

  • Specially for Informix we offer additional online seminars, workshops and training courses.

Information about service and support, so feel free to contact us with your project!



  • Request for support services for IBM databases. Our customers benefit from the competence of more than 25 years of Informix support and system-oriented development of database tools.

  • In case of support we are the first and central contact persons. We have a direct line to the IBM and HCL support departments and are available for our customers with 24x7 agreements around the clock.

  • Even Informix customers without active IBM product maintenance can take advantage of our first-aid support.

Book a support ticket on our website or just call us!

IBM Software

for manufacturers

and technology partners

IBM Embedded Solution Agreement (ESA)
integration of IBM software into your solution!

  • Integrate IBM software into your solution!

  • Benefit from the power of IBM software, take advantage of the attractive conditions for IBM licenses and maintenance!

  • The employees of CURSOR Service Distribution have twenty years of experience in indirect sales of IBM software (OEM/ASL/ESA licensing). We show you how to become an IBM ESA Business Partner!

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in Informix Administration



Admin-Scout for Informix

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  • The Informix tool right from CURSOR Informix Support.

  • Developed by administrators for administrators.

    With a background of over 25 years of Informix support, administration and system-oriented programming, we have been developing and distributing the Admin Scout since 2015.

  • By our Managed Service approach, the Admin Scout is suitable for almost all application areas of the Informix database system. Our customers are IT departments and administrators in commerce, banks, universities, trade and industry.


About us

the CURSOR Service Distribution

  • High-Value Service Provider for IBM Informix.

  • Distribution for IBM Data-Management Software (OEM/ASL/ESA licensing for ISVs).

CURSOR Service Distribution is a business unit of CURSOR Software AG, resulting from the acquisition of the Informix and development tool specialist "Nonne & Schneider" at the end of 2005.

We offer extensive technical services for IBM Informix, and as a high-value service provider we are the direct contact for all our customers' service needs for these databases.

Our services are independent from licensing through our company. Well-known customers rely on our monitoring and use our tools, while licensing and update maintenance are contracted directly with IBM.


CURSOR Software AG

For over 25 years CURSOR has been developing and marketing CRM solutions for the upper middle class and large concerns.

  • Together.
    Together with you we will lead your CRM project to success. Our experts offer comprehensive services from a single source: software development, consulting, software introduction, training, support - and the ongoing optimization of your CRM system.

  • Inspiring.
    We "live" CRM and want to inspire you with CRM software and services Made in Germany. The benchmark for this is the enthusiasm and loyalty of our customers - and their customers.

  • Successful.
    For 30 years the name CURSOR has stood for excellent customer and business process management - CRM and BPM. We measure our success by the satisfaction and market success of our customers. Learn more about successful CRM projects directly from our customers.

Latest versionsfixlist
14.10.xC11 FixList
12.10.xC16.X5 FixList
11.70.xC9.XB FixList
11.50.xC9.X2 FixList
11.10.xC3.W5 FixList
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Informix - Problem description

Problem IT06393 Status: Closed


INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10
Problem description:
In a HDR pair, if the servers disconnect and reconnect, and at 
the reconnect point, the primary determines it needs to do 
logical recovery from the secondary server which switched up 
into standard mode, under some conditions if the read ahead 
thread runs at that point, it can free up memory for rpartn 
structures but leave pointers to that memory behind.  This can 
lead to various memory corruption issues with the RSAM pool, or 
invalid mutex assertion failures when the left over pointers are 
referenced as rpartn structures, but the memory is now in use as 
something else. 
Two different invalid mutex af's enountered shown: 
10:02:40  DR: Turned off on primary server 
10:02:40  DR: Cannot connect to secondary server 
10:03:31  DR: Primary server connected 
10:03:31  DR: Primary server needs failure recovery 
10:03:43  Physical Recovery Started at Page (1:1126). 
10:03:43  Recovery Mode 
10:03:43  Physical Recovery Complete: 0 Pages Examined, 0 Pages 
10:03:44  DR: Failure recovery from disk in progress ... 
10:03:44  Logical Recovery Started. 
10:03:44  10 recovery worker threads will be started. 
10:03:44  Start Logical Recovery - Start Log 4, End Log ? 
10:03:44  Starting Log Position - 4 0x5d018 
10:13:55  Assert Failed: Invalid Mutex Type 
10:13:55  IBM Informix Dynamic Server Version 12.10.F 
10:13:55   Who: Session(5, informix@vox, 0, 0x44d79148) 
                Thread(19, btscanner_0, 44d357a8, 1) 
10:13:55  Stack for thread: 19 btscanner_0 
03:43:36  DR_ERR set to -1 
03:43:39  DR: Turned off on primary server 
03:43:39  DR: Cannot connect to secondary server 
03:44:04  DR: Primary server connected 
03:44:04  SCHAPI: thread dbWorker2 task 
post_alarm_message(19-30087) shutting down 
03:44:04  SCHAPI: thread dbWorker1 task 
post_alarm_message(19-30088) shutting down 
03:44:04  SCHAPI: thread dbScheduler(116) shutting down 
03:44:04  DR: Primary server needs failure recovery 
03:44:04  Physical Recovery Started at Page (2:92306). 
03:44:05  Physical Recovery Complete: 593 Pages Examined, 593 
Pages Restored. 
03:44:05  Recovery Mode 
03:44:05  DR: Failure recovery from disk in progress ... 
03:44:06  Logical Recovery Started. 
03:44:06  10 recovery worker threads will be started. 
03:44:06  Start Logical Recovery - Start Log 14455, End Log ? 
03:44:06  Starting Log Position - 14455 0x7a9018 
03:44:06  DR: Cleared 6076 KB of logical log in 0 seconds. 
03:44:13  Assert Failed: Invalid Mutex Type 
03:44:13   Who: Session(94022, informix@machine, 0, 0x1523b46d8) 
        Thread(44159, xchg_1.3, 14db3bdf8, 1) 
03:44:13  Stack for thread: 44159 xchg_1.3 
 base: 0x0000000152bb1000 
  len:   69632 
   pc: 0x0000000001369653 
  tos: 0x0000000152bbfa70 
state: running 
   vp: 1 
Problem Summary:
* USERS AFFECTED:                                              * 
* Users with HDR servers                                       * 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
* RECOMMENDATION:                                              * 
* Update to IBM Informix Server 12.10.xC5                      * 
Local Fix:
Problem Fixed In IBM Informix Server 12.10.xC5
not known / see Local fix
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
12.10.xC5 FixList
12.10.xC5.W1 FixList