Problem Note 62844: The LENGTHN function returns incorrect results when used within %SYSFUNC in SAS® 9.4M5 (TS1M5)
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The LENGTHN function returns incorrect results when you use it within %SYSFUNC in the fifth maintenance release of SAS 9.4 (TS1M5). The function should return a length of 0 if the value of the argument is blank. However, a length greater than 0 is being returned. This problem does not occur when you use the LENGTHN function in the DATA step.
An example of the incorrect behavior is shown in the example SAS® log output below. The LENGTHN function incorrectly returns a value of 2 when used within %SYSFUNC.
92 %let x=%sysfunc(lengthn(%str( )));
93 %put &=x;
X=2
94
95 data _null_;
96 x = lengthn(" ");
97 put x=;
98 run;
x=0
NOTE: DATA statement used (Total process time):
real time 0.02 seconds
cpu time 0.00 seconds
93 %put &=x;
X=2
94
95 data _null_;
96 x = lengthn(" ");
97 put x=;
98 run;
x=0
NOTE: DATA statement used (Total process time):
real time 0.02 seconds
cpu time 0.00 seconds
To circumvent the problem, use CALL SYMPUTX to create a macro variable instead of a %LET statement. For example:
data _null_;
call symputx('x',lengthn(" "));
run;
call symputx('x',lengthn(" "));
run;
This issue was fixed in SAS 9.4, Rev. 940_18w30.
Operating System and Release Information
| Product Family | Product | System | SAS Release | |
| Reported | Fixed* | |||
| SAS System | Base SAS | Linux for x64 | 9.4 TS1M5 | 9.4 TS1M5 |
| HP-UX IPF | 9.4 TS1M5 | 9.4 TS1M5 | ||
| 64-bit Enabled Solaris | 9.4 TS1M5 | 9.4 TS1M5 | ||
| 64-bit Enabled AIX | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Ultimate x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Ultimate 32 bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Enterprise x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2016 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2012 Std | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2012 R2 Std | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2012 R2 Datacenter | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2012 Datacenter | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2008 for x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2008 R2 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows Server 2008 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 10 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8.1 Pro x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8.1 Pro 32-bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8.1 Enterprise x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8.1 Enterprise 32-bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8 Pro x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8 Pro 32-bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8 Enterprise x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft Windows 8 Enterprise 32-bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Microsoft® Windows® for x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| z/OS 64-bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Solaris for x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Professional x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Professional 32 bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Home Premium x64 | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Home Premium 32 bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
| z/OS | 9.4 TS1M5 | 9.4 TS1M5 | ||
| Windows 7 Enterprise 32 bit | 9.4 TS1M5 | 9.4 TS1M5 | ||
The LENGTHN function returns incorrect results when used within %SYSFUNC in SAS 9.4M5. The function should return a length of 0 if the value of the argument is blank. A length greater than 0 is being returned instead.
| Type: | Problem Note |
| Priority: | high |
| Date Modified: | 2018-08-30 15:59:39 |
| Date Created: | 2018-08-30 11:13:33 |