Problem Note 66917: The result of a binary operation in the IML procedure can be incorrect if the same matrix name is used on both sides of certain assignment statements
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PROC IML might generate an incorrect result for an assignment statement when a binary operation is performed between a scalar or vector and a large matrix, and the result matrix has the same name as the scalar or vector in the expression. Binary operations include comparison operators (<, <=, >, >=), logical operators (&, |, ^), addition and subtraction (+, -), element maximum and minimum operators (<>, ><), and elementwise multiplication and division (#, /).
For example, if A is a scalar or a vector and B is a large matrix, the following can produce an incorrect result for A:
To circumvent the problem, specify a new name for the result as shown below:
Click the Hot Fix tab in this note to access the hot fix for this issue.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS/IML | z/OS | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 |
| Microsoft® Windows® for x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Enterprise 32-bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Enterprise x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Pro 32-bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Pro x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Enterprise 32-bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Enterprise x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Pro 32-bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Pro x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 10 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2008 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2008 R2 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2008 for x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 Datacenter | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 R2 Datacenter | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 R2 Std | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 Std | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2016 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2019 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Enterprise 32 bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Enterprise x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Home Premium 32 bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Home Premium x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Professional 32 bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Professional x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Ultimate 32 bit | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Ultimate x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| 64-bit Enabled AIX | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| 64-bit Enabled Solaris | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| HP-UX IPF | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Linux for x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Solaris for x64 | 15.1 | 15.3 | 9.4 TS1M6 | 9.4 TS1M8 | ||
A fix for this issue for SAS Threaded Kernel Extensions for Interactive Matrix Language 15.2 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/J3B.html#66917A fix for this issue for SAS Threaded Kernel Extensions for Interactive Matrix Language 15.1 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/J3A.html#66917| Type: | Problem Note |
| Priority: | alert |
| Topic: | Analytics ==> Matrix Programming SAS Reference ==> Procedures ==> IML |
| Date Modified: | 2020-11-30 08:53:41 |
| Date Created: | 2020-11-10 12:17:17 |