Thanks for your response. I tried to run the code again with files that were created with the EXPORT command in SPSS, but I receive the same error message.   NOTE: Libref INLIB was successfully assigned as follows:       Engine:        SPSS       Physical Name: H:\Research\Huebner Paper HIV\FINAL DASH_DATA ONLY GOOD CASES.por   ERROR:  An exception has been encountered. Please contact technical support and provide them with the following traceback information:   The SAS task name is [CONVERT] ERROR:  Read Access Violation CONVERT Exception occurred at (0459CBC9) Task Traceback Address   Frame     (DBGHELP API Version 4.0 rev 5) 000000000459CBC9  00000000300DABA0  sasxkern:tkvercn1+0xBBB89 00000000045306B4  00000000300DAC20  sasxkern:tkvercn1+0x4F674 0000000004542E4C  00000000300DADD0  sasxkern:tkvercn1+0x61E0C 00000000045420E1  00000000300DAEC0  sasxkern:tkvercn1+0x610A1 000000000453D521  00000000300DAF90  sasxkern:tkvercn1+0x5C4E1 0000000004750485  00000000300DAF98  sasyh:tkvercn1+0x2F445 000000000474F644  00000000300DBC00  sasyh:tkvercn1+0x2E604 000000000474BC3B  00000000300DBDD0  sasyh:tkvercn1+0x2ABFB 0000000004723278  00000000300DC570  sasyh:tkvercn1+0x2238 0000000024A6D65C  00000000300DC578  sasyoio:tkvercn1+0x1C61C 0000000024A654F5  00000000300DE910  sasyoio:tkvercn1+0x144B5 00000000049374B6  00000000300DE918  sasxshel:tkvercn1+0x46476 00000000049341A6  00000000300DEB20  sasxshel:tkvercn1+0x43166 000000000493AD93  00000000300DF480  sasxshel:tkvercn1+0x49D53 000000000493C31F  00000000300DF540  sasxshel:tkvercn1+0x4B2DF 0000000024A32362  00000000300DF548  sasconve:tkvercn1+0x1322 0000000024A310F4  00000000300DFBF0  sasconve:tkvercn1+0xB4 0000000003368A2B  00000000300DFBF8  sashost:Main+0x10F0B 000000000336E66D  00000000300DFF50  sashost:Main+0x16B4D 00007FF9F31E8364  00000000300DFF58  KERNEL32:BaseThreadInitThunk+0x14 00007FF9F3AF70B1  00000000300DFF88  ntdll:RtlUserThreadStart+0x21   NOTE: PROCEDURE CONVERT used (Total process time):       real time           0.03 seconds       cpu time            0.01 seconds   Part of what is confusing is that the code seems to work on my mentor's version of SAS with the same data files, but not on mine. I also tried using different names for the two library files, but no help. Any other ideas for what to try would be greatly appreciated. Thanks again! Andrew ... View more

That's not what I get, but I agree with the concept of it not being valid.    proc logistic data=Neuralgia; class Treatment Sex; model Pain= Treatment Sex Treatment*Sex Age Duration / expb stb; run;   Note that Treatment and Sex are categorical variables and there are standardized estimates for them.  ... View more

Your going to have to show both code and results if you're having trouble with interpretation.    One thing to keep an eye on is what confidence intervals you use. If it differs from method to calculate P-value you can get results that misalign, but it's usually not by much.  ... View more

What are you expecting as output for that?   If they were both categorical you could look at it for all levels, but since one is continuous you need to pick one or several values for weight to consider.      ... View more