Memory Allocation Error Java Glpk
22 Jun 2006 17:02:07 +0400 > I am writing a Java Gui which allows a user to run the model by pressing > the "run" button and change some parameters. I have written my mode in > MathProg and now I am using JNI for glpk. However I have a problem. After > the > user presses "run" a lot times (sometimes more than once) Java gives me > this > error: > > ufree: ptr ..... memory allocation error > > Do you think that it has to do with the solver? The routine ufree is a glpk version of the standard function free. The message 'ufree: ptr ..... memory allocation error' means that the pointer passed to the routine ufree is invalid, i.e. either it was not assigned through a call to umalloc/ucalloc, or the memory block it points to was already deallocated by ufree. I doubt that it is a bug in glpk code; most probably the LPX object passed via jni was corrupted. Andrew Makhorin reply via email to [Prev in Thread] Current Thread [Next in Thread] [Help-glpk] Memory allocation error, at205, 2006/06/22 Re: [Help-glpk] Memory allocation error, Andrew Makhorin<= Prev by Date: Re: [Help-glpk] formulation of a problem Next by Date: RE: [Help-glpk] (no subject) Previous by thread: [Help-glpk] Memory allocation error Next by thread: [Help-glpk] error : duplicate elements not allowed Index(es): Date Thread
has not been developped any further since GLPK 4.8. If you want to use GLPK 4.43 with Java, you could use GLPK-Java http://glpk-java.sourceforge.net Ready made libraries for Windows are included in GLPK for Windows http://winglpk.sourceforge.net If you should experience the same problem described on osdir.com with GLPK-Java, please, send me the necessary information to reproduce the issue. Best regards Xypron Andrà Felipe Fraga wrote: > > Hello all! > > There's a thread discussion on > http://osdir.com/ml/gnu.glpk/2006-06/msg00042.html about "ufree: ptr ..... > memory allocation error". https://lists.gnu.org/archive/html/help-glpk/2006-06/msg00042.html > > Anyone has figured how to solve this problem out? > > I'm using GLPK 4.43 with JNI interface. > > Thanks! > > -- > Andrà Felipe Fraga > > _______________________________________________ > Help-glpk mailing list > Help-glpk@xxxxxxx > http://lists.gnu.org/mailman/listinfo/help-glpk > > -- View this message in context: http://old.nabble.com/ufree%3A-memory-allocation-error-tp27707646p27714120.html Sent from the Gnu - GLPK - Help mailing http://osdir.com/ml/help-glpk-gnu/2010-02/msg00194.html list archive at Nabble.com. _______________________________________________ Help-glpk mailing list Help-glpk@xxxxxxx http://lists.gnu.org/mailman/listinfo/help-glpk Thread at a glance: Previous Message by Date: Re: [Help-glpk] Always running time error : " error while loading shared libraries: libglpk.so.0:" > Actually my LD_LIBRARY_PATH is correct. > Now I run: > sudo make clean > sudo ./configure --disable-shared > sudo make install You forgot to run 'make uninstall'. > I change Makefile to: > g++ -lglpk -o TestLP TestLP.o BasicFunction.o CIDR.o > (are you sure there this makefile is correct? No other options?) > Still the same error: > [sraza@obelix TestLP]$ ./TestLP > ./TestLP: error while loading shared libraries: libglpk.so.0: cannot > open shared object file: No such file or directory You reported that 'make check' works, so the package was successfully built. Thus, the only issue is that libglpk.so is not available to your program at the execution time. To resolve this issue please consult the system documentation. _______________________________________________ Help-glpk mailing list Help-glpk@xxxxxxx http://lists.gnu.org/mailman/listinfo/help-glpk Next Message by Date: [Help-glpk] replying to messages posted to help-glpk mailing list FYI: To filter spam the help-glpk
have written my mode in > MathProg and now I am using JNI for glpk. However I have a problem. After > the > user presses "run" a lot times (sometimes more than once) Java gives me > this > error: > > ufree: ptr http://osdir.com/ml/gnu.glpk/2006-06/msg00042.html ..... memory allocation error > > Do you think that it has to do with the solver? The routine ufree is a glpk version of the standard function free. The message 'ufree: ptr ..... memory allocation error' means that the pointer passed https://www.mail-archive.com/help-glpk@gnu.org/msg01774.html to the routine ufree is invalid, i.e. either it was not assigned through a call to umalloc/ucalloc, or the memory block it points to was already deallocated by ufree. I doubt that it is a bug in glpk code; most probably the LPX memory allocation object passed via jni was corrupted. Andrew Makhorin Thread at a glance: Previous Message by Date: Re: formulation of a problem > I'm in trouble with set in a problem in the glpk datastructure and I > can't find answers to my questions (perhaps I looked at the wrong > places). > The two main problems: > 1. How can I set a variable to the right hand side? > If I have a constraint like this: x1+x2 <= y1 I can't set: > > lpx_set_row_name(lp, memory allocation error 3, "constraint"); > lpx_set_row_bnds(lp, 3, LPX_UP, 0, y1); You should write all your constraint in a standard form: a[i,1]*x[1] + ... + a[i,n]*x[n]
solves and deletes lots of different optimisations I get the following error: xfree: memory allocation error Error detected in file glplib07.c at line 138 Thus far I haven't found a quick way of reproducing the problem but it always happens eventually. Does anyone have any ideas on how I might start to troubleshoot this? I'm using GLPK 4.28, glpk_jni.dll, JNI and Java. My knowledge of C is also very limited so suggestions of general causes of the error would be very helpful Thanks Dan _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk Previous message View by thread View by date Next message [Help-glpk] Memory allocation error at205 Re: [Help-glpk] Memory allocation error Andrew Makhorin [Help-glpk] memory allocation error Dan Tulk Re: [Help-glpk] memory allocation error Andrew Makhorin Re: [Help-glpk] memory allocation error Axel Simon Reply via email to Search the site The Mail Archive home help-glpk - all messages help-glpk - about the list Expand Previous message Next message The Mail Archive home Add your mailing list FAQ Support Privacy 1329736201.20080516112935@gnu.org