SUPPORT / SAMPLES & SAS NOTES
Problem Note 64189: The OPTMODEL or OPTMILP procedures might lose communication with a CAS worker node and fail to complete the optimization
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If you specify the DECOMP option in the PROC OPTMILP statement or in the SOLVE WITH MILP statement in PROC OPTMODEL, communication with a CAS worker node might be lost. If this happens, the optimization does not complete and the following warning and error messages are issued in the CAS server log:
WARNING: Communication with machine <name> has been lost.
ERROR: The action cannot be retried because the session has no available workers.
ERROR: The operation was not performed because contact with at least one node was lost before the operation could complete.
tracktkt generates the following traceback on the worker nodes:
ERROR: The system has encountered an unhandled Exception.
: Please contact technical support and provide them
: with the following traceback and system dump information:
ABORT: SAS/TK is aborting
: Abort Log file [/cascache/castracktkt.3781]
: ---------------------------------------
: Time [mm/dd/yyy hh:mm:ss ]
: ---------------------------------------
: Thread Name [GenThread]
ERROR: The action cannot be retried because the session has no available workers.
ERROR: The operation was not performed because contact with at least one node was lost before the operation could complete.
tracktkt generates the following traceback on the worker nodes:
ERROR: The system has encountered an unhandled Exception.
: Please contact technical support and provide them
: with the following traceback and system dump information:
ABORT: SAS/TK is aborting
: Abort Log file [/cascache/castracktkt.3781]
: ---------------------------------------
: Time [mm/dd/yyy hh:mm:ss ]
: ---------------------------------------
: Thread Name [GenThread]
A possible workaround is to remove the DECOMP option and solve the problem directly as a mixed integer linear program (MILP).
Click the Hot Fix tab in this note for a link to instructions about accessing and applying the software update.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS/OR | z/OS | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 |
| Microsoft® Windows® for x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8 Enterprise 32-bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8 Enterprise x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8 Pro 32-bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8 Pro x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8.1 Enterprise 32-bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8.1 Enterprise x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8.1 Pro 32-bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 8.1 Pro x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows 10 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2008 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2008 R2 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2008 for x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2012 Datacenter | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2012 R2 Datacenter | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2012 R2 Std | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Microsoft Windows Server 2012 Std | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Enterprise 32 bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Enterprise x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Home Premium 32 bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Home Premium x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Professional 32 bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Professional x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Ultimate 32 bit | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Windows 7 Ultimate x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| 64-bit Enabled AIX | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| 64-bit Enabled Solaris | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| HP-UX IPF | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Linux for x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||
| Solaris for x64 | 14.1 | 14.1 | 9.4 TS1M3 | 9.4 TS1M3 | ||