File misread problems
Some file formatting problems are reported with error messages. Others simply mislead Winsteps.
(a) All control and data files must be in "DOS TEXT" or ASCII format.
(b) To check if your control specifications have been correctly interpreted, look at Table 0, at the end of your "output" file.
(c) To check if your data have been correctly interpreted, produce an RFILE= file and look at the response strings, particularly for column alignment.
Common Problems and their Diagnoses
1) Message: VARIABLE UNKNOWN OR VALUE INVALID:
Diagnosis: A line in your control file is not of the format "variable = value". This may be because your control file is in not in DOS Text or ASCII format. Return to your text editor and save your control file as a DOS Text file. Then rerun.
2A) Message: PROBLEM: BLANK LINE NEEDED AT END OF: filename
Diagnosis: The last line of file "filename" does not end with a line-feed (LF) code (so does not meet strict Windows specifications). This can be fixed by adding a blank line to the end of that file. You can use Notepad to do this by editing the file from the Winsteps .
Use last entry in File menu to add final blank line to:
Then press enter key, or enter a different file name:
Diagnosis: The last line of file "filename" does not end with a line-feed (LF) code (so does not meet strict Windows specifications). This can be fixed by adding a blank line to the end of that file. You can use Notepad to do this by access the file from the Winsteps File menu. It will probably be the last file listed there. You could also copy the file, add a blank last line, and then type in the file name in Winsteps.
3) Blank characters disappear, causing misalignment of data or control instructions.
(a) These "blank" characters could be ASCII "13" (CR) codes. Some word processors treat them as blanks, some as end-of-line codes, and some ignore them, making them "disappear". Winsteps ignores them. WordPad reports them as squares. Replace them with blanks.
(b) These "blank" characters could be ASCII "9" (TAB) codes. Word processors expand these into several blanks.
Winsteps treats them as one blank. For consistency, globally replace Tab characters with blanks.
4) Data or control lines disappear.
(a) Word processors automatically wrap long lines across several lines. Winsteps does not. Make sure that each line ends with an "end of line" code.
(b) Some word processors use ASCII "13" (CR) as an end-of-line code. Winsteps ignores these codes. Use ASCII "10" (LF) as the end-of-line code. Press the Alt key, while typing 10 on the numeric keypad to generate this code.
5) Data or control lines are split across several lines.
Diagnosis: You may have edited your control or data files with a word processor that wrapped one line across several lines. When you saved this file in DOS text format, each line was then saved as several lines. Re-edit the file, reduce the point size, maximize the page size (e.g., landscape) until each line only occupies one line. Then save the file again in DOS text or ASCII format.
6) Message: BEYOND CAPACITY
Diagnosis: Your data file contains more person records than can be analyzed in one run. Some records have been bypassed.
Data sets that exceed program capacity to analyze in one run offer opportunities, as well as challenges. There are several strategies.
I. Analyze a sample of the data. Use this to produce anchor values. Then, using the anchor values, run all the data one section at a time.
II. Analyze a sample of the data. Analyze another sample. Compare results to identify instability and compute reasonable anchor values. Remember that small random changes in item calibrations have negligible effect on person measures.
To select a sample of your data, use the FORMAT= statement. See the example on pseudo-random person selection on page .
There are versions of Winsteps that support more persons. Contact www.winsteps.com for details.
7) File errors
PROBLEM: FILE NAMING
PROBLEM: Access denied (5): for file: c:\myfolder\myfile.txt
a) Folder c:\myfolder does not exist
b) You may not have access rights (UAC) to file: c:\myfolder\myfile.txt
c) c:\myfolder\myfile.txt may be specified as an input file and an output file in the same analysis
d) c:\myfolder\myfile.txt may already be open in another analysis or by another application
e) c:\myfolder\myfile.txt may be an output file that already exists and is read-only.
Help for Winsteps Rasch Measurement Software: www.winsteps.com. Author: John Michael Linacre
For more information, contact firstname.lastname@example.org or use the Contact Form
|Facets Rasch measurement software.
Buy for $149. & site licenses.
Freeware student/evaluation download
Winsteps Rasch measurement software. Buy for $149. & site licenses. Freeware student/evaluation download
|State-of-the-art : single-user and site licenses : free student/evaluation versions : download immediately : instructional PDFs : user forum : assistance by email : bugs fixed fast : free update eligibility : backwards compatible : money back if not satisfied|
Rasch, Winsteps, Facets online Tutorials
|Forum||Rasch Measurement Forum to discuss any Rasch-related topic|
Click here to add your email address to the Winsteps and Facets email list for notifications.
Click here to ask a question or make a suggestion about Winsteps and Facets software.
|Rasch Measurement Transactions (free, online)||Rasch Measurement research papers (free, online)||Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch||Applying the Rasch Model 3rd. Ed., Bond & Fox||Best Test Design, Wright & Stone|
|Rating Scale Analysis, Wright & Masters||Introduction to Rasch Measurement, E. Smith & R. Smith||Introduction to Many-Facet Rasch Measurement, Thomas Eckes||Invariant Measurement with Raters and Rating Scales: Rasch Models for Rater-Mediated Assessments, George Engelhard, Jr. & Stefanie Wind||Statistical Analyses for Language Testers, Rita Green|
|Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar||Journal of Applied Measurement||Rasch models for measurement, David Andrich||Constructing Measures, Mark Wilson||Rasch Analysis in the Human Sciences, Boone, Stave, Yale|
|in Spanish:||Análisis de Rasch para todos, Agustín Tristán||Mediciones, Posicionamientos y Diagnósticos Competitivos, Juan Ramón Oreja Rodríguez|
|Winsteps Tutorials||Facets Tutorials||Rasch Discussion Groups|
|Coming Rasch-related Events|
|Jan. 5 - Feb. 2, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|Jan. 10-16, 2018, Wed.-Tues.||In-person workshop: Advanced Course in Rasch Measurement Theory and the application of RUMM2030, Perth, Australia (D. Andrich), Announcement|
|Jan. 17-19, 2018, Wed.-Fri.||Rasch Conference: Seventh International Conference on Probabilistic Models for Measurement, Matilda Bay Club, Perth, Australia, Website|
|Jan. 22-24, 2018, Mon-Wed.||In-person workshop: Rasch Measurement for Everybody en español (A. Tristan, Winsteps), San Luis Potosi, Mexico. www.ieia.com.mx|
|April 10-12, 2018, Tues.-Thurs.||Rasch Conference: IOMW, New York, NY, www.iomw.org|
|April 13-17, 2018, Fri.-Tues.||AERA, New York, NY, www.aera.net|
|May 22 - 24, 2018, Tues.-Thur.||EALTA 2018 pre-conference workshop (Introduction to Rasch measurement using WINSTEPS and FACETS, Thomas Eckes & Frank Weiss-Motz), https://ealta2018.testdaf.de|
|May 25 - June 22, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|June 27 - 29, 2018, Wed.-Fri.||Measurement at the Crossroads: History, philosophy and sociology of measurement, Paris, France., https://measurement2018.sciencesconf.org|
|June 29 - July 27, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com|
|July 25 - July 27, 2018, Wed.-Fri.||Pacific-Rim Objective Measurement Symposium (PROMS), (Preconference workshops July 23-24, 2018) Fudan University, Shanghai, China "Applying Rasch Measurement in Language Assessment and across the Human Sciences" www.promsociety.org|
|Aug. 10 - Sept. 7, 2018, Fri.-Fri.||On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com|
|Sept. 3 - 6, 2018, Mon.-Thurs.||IMEKO World Congress, Belfast, Northern Ireland www.imeko2018.org|
|Oct. 12 - Nov. 9, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
Our current URL is www.winsteps.com
Winsteps® is a registered trademark
|Concerned about aches, pains, youthfulness? Mike and Jenny suggest Liquid Biocell|