I am trying to output a results of a transient analysis in APDL of a beam to a file using *VWRITE.
But i keep getting the error message "error in format not enough data format specifiers". I have written the script snippet below.
*CFOPEN,results,csv !create file to comma separated value
*VWRITE,tstep,y,u,0,0
*CFCLOS
Any help is very much appreciated. I have had no result after detailed shuffling through other Ansys forum archives. Thank you.
Hello. You should specify the format of the file you want to save. I attached a part of my macros with such commands.So you can use it as an example.
FINISH
/POST1
!.......Operations
*cfopen,outfile,txt,,APPEND
*vwrite,c,delta,A,ts
(F8.4,' ',F8.4,' ',F8.4' ',F8.4)
*cfclos
Hello. You should specify the format of the file you want to save. I attached a part of my macros with such commands.So you can use it as an example.
FINISH
/POST1
!.......Operations
*cfopen,outfile,txt,,APPEND
*vwrite,c,delta,A,ts
(F8.4,' ',F8.4,' ',F8.4' ',F8.4)
*cfclos
Hello. You should write the format descriptors on the line immediately following the command *VWRITE and you should avoid using indentation (tabs or spacing) in this line. The format descriptors can be in either Fortran or C format.
Fortran format (like Pavel explained):
Displacement=0.001
*CFOPEN,'File','txt'
*VWRITE,Displacement
(F10.5)
*CFCLOS
C format:
Displacement=0.001
*CFOPEN,'File','txt'
*VWRITE,Displacement
%10.5f
*CFCLOS
If you are in the GUI, the *VWRITE command must be contained in an externally file and read into ANSYS (i.e., *USE, /INPUT, or in the GUI – File – Read input from), i.e., you should not copy the code directly to the command prompt.
Sincere thanks for your kind inputs. However I am still getting the stupid format specifier error. I have tried your suggestions and combinations. I wonder what I could be missing. The text file gets created at the default root folder but the content is empty. I intend to use it to tabulate the time reponses in a transient analysis. I am giving my entire script with suitable comments and the the *VWRITE command where I intend to use it. Kindly have a look. Thank you again.
ANTYPE,4 ! Transient analysis
TRNOPT,FULL,,DAMP ! Full mode
LUMPM,0 ! Lumped mass set to zero
OUTRES,ALL,ALL ! Controls the solution data written to the database
DELTIM,Tres ! Specifies the time step sizes to be used for load steps
ALPHAD,0 ! Rayleigh damping coefficients set to 0 and 0.00015
BETAD,0.00015
TINTP,,0.25,0.5,0.5 ! Integration parameters,by default Alpha=0.25,Delta=0.5,Theta=0.5
TIME,Tstep ! time is set equal to the time step at the end of load
F,250,FZ,2.4 ! Input force of magnitude 2.4 N at node 250
KBC,1 ! stepped load
SOLVE ! Solve
FDELE,250,ALL ! load is removed here
*GET,y,NODE,351,U,Z
! Brace yourselves ANSYS is about to get haywire
*CFOPEN,'Response','txt'
*VWRITE,Tstep,y
F8.4,'',F8.4
*CFCLOS
If you are using the FORTRAN format you need to enclose the format descriptors inside parenthesis
Yessssss. Got it. "Never underestimate the power of a parenthesis". Your earlier answer was also helpful. I made a mistake of directly typing the *VWRITE command into the command prompt. Thanks a lot.
when i run following loop, ansys shows this errors: " Missing separator between two fields." & "Error in format, not enough data format specifiers ". what's wrong?
*DO,I,1,5
SET, I
/OUTPUT,ADISP,OUT,,APPEND
*VWRITE,UX(NA),UY{NA),UZ(NA)
(E16.8,5X,E16.8,5X,E16.8,5X)
/OUTPUT
/OUTPUT,BDISP,OUT,,APPEND
*VWRITE,UX(NB),UY(NB),UZ(NB)
(E16.8,5X,E16.8,5X,E16.8,5X)
/OUTPUT
*ENDDO
1 Recommendation
10th Oct, 2015
Yogeshwaran Ravichandran
SRM Institute of Science and Technology
I am trying to print values form ansys to text file. I am using *VWRITE
syntax which I followed as mentioned below...........
a=5/4
b=6/7
*cfopen,formatsp,txt,G:\outputfiles,append
*VWRITE,a,b
(F10.2,F5,2)
*cfclose
but i am getting an error message as
(F10.2,F is not a recognized BEGIN command, abbreviation, or macro. This command will be ignored.
if anyone know the reason solve my problem
thank you
1 Recommendation
7th Jul, 2016
Mohan Prasad Selvaraj
Technische Universität Hamburg
Hello friends
I need to save my ansys result in a text file, I have used the command,
/OUTPUT,output,txt
but I get an error stating
'the program is unable to open output.txt.'
I have attached the error message, could you please help how to resolve this problem ,
thank a lot
7th Jul, 2016
Rajkumar Shufen
Indian Institute of Technology Guwahati
Mohan, your question is too short. Please be more specific. Anyway the problem is that I think you are not using *VWRITE command. Use *VWRITE command. That's the command you use to write an ouput to a text file.
7th Jul, 2016
Mohan Prasad Selvaraj
Technische Universität Hamburg
Hai rajkumar,
I use my apdl codes to generate stress intensity factor K1, K2, K3, so I would like to store this value in output file. How should my *vwrite command should be, My post processor command is given below, Could please suggest the correct code to store the value in output.txt
/POST1
CLOCAL,11,0,250,135,0,-90 ! Displacement extrapolation method
CSYS,11
PATH,crack,5,30,20
PPATH,1,361
PPATH,2,403
PPATH,3,398
PPATH,4,393
PPATH,5,388
KCALC,1,1,3,1
!*cfopen,output,txt
!*vwrite
/OUTPUT,output,txt
FINISH
7th Jul, 2016
Rajkumar Shufen
Indian Institute of Technology Guwahati
You cannot directly type the *Vwrite in the command prompt. Try this procedure
-Go to your root folder of ANSYS save database which is by default C:\Users\Your PC name
-Make a new txt file named output.txt and type the following code snippets and save it. The vwrite command must be followed by the variable names you want to output. Supossing two variables named 1 and 2 you write
*vwrite,variable1,variable,2
F8.4,'',F8.4
! do a format specifier format
-Come back to ANSYS and type
POST1
CLOCAL,11,0,250,135,0,-90 ! Displacement extrapolation method
CSYS,11
PATH,crack,5,30,20
PPATH,1,361
PPATH,2,403
PPATH,3,398
PPATH,4,393
PPATH,5,388
KCALC,1,1,3,1
\INPUT,output,txt
I hope this helps.
Again you cannot type vwrite directly in the command prompt. You have to use it from a text file. In the text file you have to type the vwrite command.
2 Recommendations
7th Jul, 2016
Mohan Prasad Selvaraj
Technische Universität Hamburg
Hello Rajkumar,
I updated my postprocessor codes as shown below
KCALC,1,1,3,1
a=10
*cfopen,output,txt,C:\Users\cfo1714\python
*vwrite, KI, KII,a
(F10.8,/F10.8,/I4) !(fortan format - integer with three decimal places)
*cfclos
FINISH
I get an answer of
0.00000000
0.00000000
****
even the constant is not obtained in output, Could you please help me in correcting the error.
thank you.
1 Recommendation
7th Jul, 2016
Mohan Prasad Selvaraj
Technische Universität Hamburg
Hello friends,
Has anyone experienced such errors? Please help me it would be a great help to me.
Thank you.
1 Recommendation
9th Sep, 2016
Gangisetty Venkatesh
Indian Institute of Information Technology, Design & Manufacturing, Kancheepuram, India
I am trying to solve impact analysis using apdl but finally after giving all input when i solving it it is saying "no data sets on input file" ,,,,load set not found on result file xxx.rst please help how can surmount this problem
2 Recommendations
2nd Feb, 2018
Siddappa P G
Indian Institute of Technology Roorkee
@ Mohan Prasad Selvaraj TRY THIS manually after opening the write array values window
*VWRITE, KI (1), , , , , , , , ,
(E20.8)
1 Recommendation
8th Aug, 2018
Punnag Chatterjee
North Carolina State University
Rajkumar Shufen This is an interesting and useful thread.
I am trying to write a tabular data (obtained from a probe, see in atatched picture) using command snippet in ANSYS Workbench>Transient Mechanical module. I am getting the ANSYS error
"An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes."
Any help would be appreciated. Thanks.
P.S. I have already created a blank "output_ANSYS.txt" file and placed it in the root directory as well as working directory.
10th Oct, 2018
Hussam Ali Mohammed
Al-Furat Al-Awsat Technical University
Good question.. Please share me the best answer might you trust...
Regards…
3rd Mar, 2019
Akhileshwar Pandey
Motilal Nehru National Institute of Technology
@ Mohan Prasad Selvaraj
Problem appears to be with data identifiers ...
One could try this....
*VWRITE, K(1), K2 , , , , , , ,
%g,%g
It's general purpose and work well...
10th Oct, 2019
Jonas Tieppo da Rocha
Universidade Federal do Rio Grande do Sul
I know you already solved the problem, but if someone also had this problem in ANSYS 2019, it may helps:
For some reason, you need to create a macro in advance:
!Code to write parameter 'teste' in the file 'filepar.txt'
*CREATE,macrotowrite
*CFOPEN,'filepar','txt','..\..\..\Masters\Thesis\AnsysCodes\MainCode\Matlab\'
*VWRITE,teste, , , , , , , , ,
(F8.0)
*CFCLOS
*END
/INPUT,macrotowrite !*
1 Recommendation
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