An Error Encoutered in SAS IML for NLPNRA subroutine

MoshiurRahman — Sun, 02 Feb 2014 21:25:26 GMT

Hi,

I am new in IML computing system and have received the following ERROR (at the end of the code) after submitting the following PROC IML program calling NLPNRA subroutine. Did I make any mistake in the program code. Thank you in advance for your generous assistance in this regard. Mohammad

1 PROC IML;

NOTE: IML Ready

2 *y age female;

3 data={1 23 1, 1 20 0, 0 18 0, 1 20 1, 0 25 1, 0 22 0, 0 20 1,

4 1 24 0, 1 20 1, 0 19 0, 0 20 1, 0 24 1, 0 22 1, 0 19 1, 1 20 0};

5 print data;

7 y = data[,1];

8 n = nrow(data);

9 x = repeat(1,n,1)||data[,2:3];

10 print n y x;

11 start logLik(B0) global(y,x);

12 beta = j(3,1,0);

13 print beta;

14 beta = B0`;

15 print beta;

16 z=x*beta;

17 print z beta;

18 p=1/(1+exp(-z));

18 ! /* distribution function (f) and density (p) */

19 f=p#p#exp(-z);

20 print p f;

21 logL = sum((y=1)#log(p) + (y=0)#log(1-p));

22 print logL beta;

23 return ( logL );

24 finish;

NOTE: Module LOGLIK defined.

25 B0=j(1,3,0.01);

26 print B0;

27 opt ={1,4};

28 call nlpnra(rc, xres, "LogLik",B0,opt);

ERROR: An exception has been encountered.

Please contact technical support and provide them with the following traceback information:

The SAS task name is [IML]

ERROR: Read Access Violation IML

Exception occurred at (044D7C31)

Task Traceback

Address Frame (DBGHELP API Version 4.0 rev 5)

00000000044D7C31 0000000009CCC820 saswob:tkvercn1+0x6BF1

00000000074A9828 0000000009CCC828 sasoda:tkvercn1+0x287E8

00000000074A2E93 0000000009CCC8D0 sasoda:tkvercn1+0x21E53

0000000007490537 0000000009CCC960 sasoda:tkvercn1+0xF4F7

000000000A1EDC07 0000000009CCC968 sasmrk:tkvercn1+0x7CBC7

000000000749031C 0000000009CCCE80 sasoda:tkvercn1+0xF2DC

00000000060D7C58 0000000009CCCE88 sasods:tkvercn1+0x186C18

0000000005F82628 0000000009CCD0E0 sasods:tkvercn1+0x315E8

0000000005F81EA9 0000000009CCD1E0 sasods:tkvercn1+0x30E69

000000000CEBDD58 0000000009CCD1E8 sasinlp:tkvercn1+0xECD18

000000000CE187AE 0000000009CCDEE0 sasinlp:tkvercn1+0x4776E

000000000CE1765F 0000000009CCDFF0 sasinlp:tkvercn1+0x4661F

000000000CDE144D 0000000009CCE060 sasinlp:tkvercn1+0x1040D

000000000CE91178 0000000009CCE2E0 sasinlp:tkvercn1+0xC0138

000000000CDF683A 0000000009CCE3D0 sasinlp:tkvercn1+0x257FA

000000000CDDC249 0000000009CCF500 sasinlp:tkvercn1+0xB209

000000000CDDC891 0000000009CCF530 sasinlp:tkvercn1+0xB851

0000000007E212B4 0000000009CCF538 sasxfnc:tkvercn1+0x274

0000000009AFD163 0000000009CCF5D8 sasiml:tkvercn1+0xC123

0000000009AF260F 0000000009CCFB20 sasiml:tkvercn1+0x15CF

0000000009AF4241 0000000009CCFC50 sasiml:tkvercn1+0x3201

0000000009AF12F7 0000000009CCFCB0 sasiml:tkvercn1+0x2B7

0000000003418FD7 0000000009CCFCB8 sashost:Main+0xF917

000000000341D5FD 0000000009CCFF50 sashost:Main+0x13F3D

00000000775A652D 0000000009CCFF58 kernel32:BaseThreadInitThunk+0xD

00000000777DC541 0000000009CCFF88 ntdll:RtlUserThreadStart+0x21

NOTE: The SAS System stopped processing this step because of errors.

ERROR: An exception has been encountered.

Please contact technical support and provide them with the following traceback information:

The SAS task name is [IML]

ERROR: Read Access Violation IML

Exception occurred at (044D7C31)

NOTE: PROCEDURE IML used (Total process time):

real time 1:06.22

cpu time 9.67 seconds

Re: An Error Encoutered in SAS IML for NLPNRA subroutine

Rick_SAS — Mon, 03 Feb 2014 15:35:00 GMT

The error is that you should not use a print statement in an NLP subroutine.

Delete the PRINT statements and you should get a result.

For more on maximum likelihood estimates in IML, see

Maximum likelihood estimation in SAS/IML - The DO Loop

Re: An Error Encoutered in SAS IML for NLPNRA subroutine

MoshiurRahman — Mon, 03 Feb 2014 18:14:41 GMT

Very many thanks, Dr. Wicklin. You are correct that opt[2]= does not allow the print command in NLPNRA subroutine as it invokes printing based on the value on opt[2]= (say, 4 in this case). Print statement and opt[2] argument contradict each other and this makes SAS system un-operational (as a result we have to re-start the SAS session). I think this is a technical issue SAS will take care about the matter in future.

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An Error Encoutered in SAS IML for NLPNRA subroutine

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