I have a matlab script, that every now and them produces the message:
Caught std::exception Exception message is:
bad allocation
Unexpected error status flag encountered. Resetting to proper state.
What could be causing this?
This is a bug in MATLAB, in which some part of MATLAB is not handling a std::bad_alloc exception correctly (std::bad_alloc is an out-of-memory exception thrown from the C++ runtime library).
The "Unexpected error status flag encountered. Resetting to proper state." is an internal diagnostic - you shouldn't see it unless MATLAB has gotten into a bad state, which in this case is happening because it's encountering the bad_alloc someplace where it was not expected. Recent versions of MATLAB have fixed most of these issues, except in extremely low-memory situations (like, there's less than 1 kilobyte of free memory left). What version are you using?
My best guess is that your script is trying to allocate some memory and failing. The occurrence of such an error will depend on the availability of memory on your computer at the time allocation is attempted. The available memory will vary according to what is going on at the time in other programs, the operating system, even the state of your Matlab session.
For a more accurate diagnosis, you'll have to tell us more, maybe even post your script.
It was happening to me, and it turned out I had too many files open. fclose('all') set everything back to normal, and I made sure that all my fopen were followed by fclose.
Related
I got the following runtime error:
2014-12-10 19:26:39.695 Bliss2[21855:994070] Error: object not found for update (Code: 101, Version: 1.5.0)
I assume the [21855:994070] has a meaning.
How do I use it to track down the error in the code?
That is not a "runtime error". It is an NSLog message and has been executed and logged in perfectly good order (e.g. by some third-party code you are using?). Of course the code may then have thrown an exception / aborted, but if it did (and I don't know whether it did), that has nothing to do with the log message itself, except that you're being told first that there's a problem, apparently as a courtesy.
As for the numbers, they probably have nothing to say that will concern you here. The first number is your process number and won't be stable between invocations; it is rarely of interest. The second number is the thread number and is of interest when there are many log statements for discovering whether this log statement is executed in a background thread (or in the same thread as other log statements).
Though, I set variable NYTPROF to "forkdepth:1", When i try to nytprofmerge the profiler outputs for my forked children along with it's parent, I get a message that says:
Reading nytprof.13232.out.21321
Option 'forkdepth' has value '-2' in nytprof.13232.out.21321 which differs from the previous value '-1'; this implies inconsistent profiles and thus garbage results.
Does anyone know a fix or why this is happening?
I'd take a guess that that's a bug in nytprofmerge and can be ignored.
Feel free to file a bug report. (A small script that reproduces the problem would be super helpful).
Can't find this anywhere else so I thought I'd post a question: Anyone have experience with this OpenBUGS error message?
"Sorry something went wrong in procedure Directory.This in module HostFonts"
I get this error periodically, typically when running larger models, sometimes it happens when I try to sample a parameter, and often it's accompanied by a BlackBox message about an "illegal memory write" which repeatedly pops up until openbugs basically crashes (text dissappears, repeated blackbox messages, etc.
My only theory is this is that I'm storing too many parameter samples, except I don't understand the error message about fonts. What does this have to do with fonts?
Thanks for any insight you may have!
I am posting this question as I could not find the answer on googling and stackoverflowing it...
The question is :
What happens when Virtual memory's swap space is exhausted. How does OS handles this situation when all the RAM and Virtual Memory is exhauseted.
Does it secretly use more space on HDD, Or notify an exception
I am going to assume that by virtual memory you are referring to swap space (they are technically different concepts). I can think of two things:
The program checks to make sure that the allocation went well (ie in C there is a return code for malloc) and if it did not go well, then it will gracefully exit with a once-ubiquitous "Out of memory" Error message. Java and C++ have exceptions for the same purpose.
The program doesn't check because, really, who runs out of memory anymore? (This is a programmer thinking here.) I would bet that chances are there are many programs written out there that do not check to see if a call to malloc succeeded or not, and therefore they try to use a bad pointer and cause a memory access violation, causing the program to exit with a nice "This program has encountered a problem" message in windows, or a succinct "Segfault" message in Unix.
I'm not sure as to how Windows handles it, but on *nix systems, the kernel runs the OOM Killer program (more information can be found here http://linux-mm.org/OOM_Killer)
I have a wxWidgets/GTK based application that works well - except for one installation on an Debian Squeeze ARM system. There it crashes when the user just activates the main window of it. To find the reason for that I added a signal handler to the application and use libunwind out of that signal handler to find the source for the crash. During a test that worked fine, when the software writes e.g. to address 0x0 libunwind correctly points me to the function where that happens.
But the results for the system where the crash appears unexpectedly are a bit strange, they seem to happen outside of my application. One crash comes from a function with no name (here libunwind returns an empty string), and one is caused by "malloc_usable_size", a system function which should never die this way.
So...what to do next? All ideas, suggestions or any other hints are welcome since I'm not sure how to contunue with that problem...
Check for buffer overrun or overwriting some memory unexpectedly for any structures, pointers, memory locations for items returned by library functions.
Check for invalid pointer frees in your code for the library allocated pointers that you are using.
May be using valgrind would also help.