# History output not generated **URL:** \ **Category:** Bug Reports\ **Created:** [August 1, 2023, 10:54am UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007 "2023-08-01T10:54:47Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Cimek](https://avatars.discourse-cdn.com/v4/letter/c/f0a364/32.png) [@Cimek](https://prepomax.discourse.group/u/Cimek)\ **Post date:** [August 1, 2023, 10:54am UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/1 "2023-08-01T10:54:47Z")
Hi! I read this topic with a similar issue, but i don’t know if it is related: > [@History output (forces)](https://prepomax.discourse.group/t/history-output-forces/335): > > Hi I am probably doing something wrong but I just ran a model with a few history outputs requests and I don’t find anything when I go to post process. I can create them in the post processing but I don’t see a way to make summed outputs. I am looking for is the total load from a particular contact interaction. Any ideas? This is with the current release (1.3.4) maybe I can pull them out of the results file manually somehow? (with pandas etc) \*\* History outputs +++++++++++++++++++++++++++++++… I’m using PPM v1.4.0 explicit dynamic analysis and the history outputs defined in the step definition are not getting generated in the results. I tried node outputs and element outputs and non are getting generated. This is probably related to the error i get when opening the .frd file: ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/f/f089b0621ed8e7fc409fc5a3aff5da6bce1e2824.png) I have a feeling this is related to the size of the files, since the .frd file is 1,7GB and the .dat file id 2,5GB. I would also add another problem I noticed. When I kill a running analysis and try to open the results that were generated up to that point using the Results button in the Monitor I get the following error: ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/8/8bfcfb1dd7013d1ada253e4e5ab385abe0e6c846.png) But I can open the generated .frd file using File → Open and it opens fine. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [August 1, 2023, 12:13pm UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/2 "2023-08-01T12:13:16Z")
Try reducing the frequency of output. The default output every single increment is usually too frequent considering the huge number of increments in explicit dynamics analyses. Try with something like every 10-20 increments or even more to reduce the size of the .dat file. > [@Cimek](#): > > I would also add another problem I noticed. When I kill a running analysis and try to open the results that were generated up to that point using the Results button in the Monitor I get the following error: This is a known behavior: [Active results vs check mark/red sign - #9 by FEAnalyst](https://prepomax.discourse.group/t/active-results-vs-check-mark-red-sign/705/9) ---
**Author:** ![Cimek](https://avatars.discourse-cdn.com/v4/letter/c/f0a364/32.png) [@Cimek](https://prepomax.discourse.group/u/Cimek)\ **Post date:** [August 1, 2023, 12:23pm UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/3 "2023-08-01T12:23:27Z")
I did, the frequency is set to 25 but it looks like it is still too low since there were 5525 increments so 221 were stored. I will set it to 50 or 100 next time. Is there any way this limitation in reading large results could be increased? ---
**Author:** ![Cimek](https://avatars.discourse-cdn.com/v4/letter/c/f0a364/32.png) [@Cimek](https://prepomax.discourse.group/u/Cimek)\ **Post date:** [August 3, 2023, 9:25am UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/4 "2023-08-03T09:25:45Z")
I did some testing in the past few days and I’m still getting the same error “Could not load f:.….dat” even if the .dat file is only 93 KB. So file size is not the issue here. Any ideas on what else could be causing the issue? ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [August 3, 2023, 11:35am UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/5 "2023-08-03T11:35:34Z")
Could you please share the .dat file that gives you problems? ---
**Author:** ![Cimek](https://avatars.discourse-cdn.com/v4/letter/c/f0a364/32.png) [@Cimek](https://prepomax.discourse.group/u/Cimek)\ **Post date:** [August 3, 2023, 12:33pm UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/6 "2023-08-03T12:33:04Z")
Ofcourse: [Analiza.zip](https://prepomax.discourse.group/uploads/short-url/pXn9XATEbXo6Pke9FcoJocF2Y0K.zip) (2.2 MB) I also added the .pmx file so you can run it yourself. With CalciliX v2.21 using PaStiX it runs for about 30 mins. Curently it doesn’t converge, because I’m testing some settings, but it runs for long enough for you to test it. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [September 11, 2023, 11:13am UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/7 "2023-09-11T11:13:27Z")
The error while reading the .dat file was fixed in the latest developer version. I am closing the topic. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [September 11, 2023, 11:13am UTC](https://prepomax.discourse.group/t/history-output-not-generated/1007/8 "2023-09-11T11:13:35Z")