Floating Point Error Computing Vensim
on the Simulate button and answer Yes to the query about overwriting.You should see about the same thing that we saw last time except this time the message should be: ERROR: Floating point error computing - target price - at time = 30.000000. Trying to save the results anyway You can apply same analysis technique we used previously to understand the problem. Here is a table of target price and its causes: NOTE In order to see values for all times you will need to delete the Table tool output and then click on the Table tool again. There are two things to notice about this output. First the value for target price at time 29 and 30 is the same even though the inputs are different. When an error occurs during simulation the values reported for variables that were not successfully computed will simply be those of the previous time. Second, the reason for the error is the same as it was in the previous case. Since the error occurred during the simulation we can use the Causes strip to understand what lead to the problem. ØClick on target price to select it into the workbench.ØClick on the Causes strip.ØTrace the causes of the behavior using the Causes strip through the sequence expected demand, demand, effect price demand, price, change in price and back to target price.We have traced around a positive feedback loop that is loosely higher price, lower demand, lower expected sales higher price needed to meet revenue targets. This is exponential growth and it causes an error because it is occurring so quickly.
this forum to post Vensim related questions. Post Reply Print view Search Advanced search 7 posts • Page 1 of 1 grockson Junior Member Posts: 19 Joined: Mon Apr 14, 2008 4:19 pm Floating point error computing Quote Postby grockson » Fri Oct 24, 2008 8:56 pm Dear Experts, Could you assist me to manage the above subject in my model. Hope to hear from you soon, with you suggestions and comments. Sincerely, George Rockson Attachments Passive C Oct1T.mdl (11.95 KiB) Downloaded 159 https://www.vensim.com/documentation/20510.htm times Top LAUJJL Senior Member Posts: 1118 Joined: Fri May 23, 2003 10:09 am Location: STRASBOURG FRANCE Floating point error Quote Postby LAUJJL » Sat Oct 25, 2008 8:53 am Hi George I have replaced the formula "area cs-0"*(1-compaction factor^(2/3)) by "area cs-0"*(1-((compaction factor^2) ^(1/3) ) ) Compaction factor ^2 becomes positive with compaction factor being negative http://www.ventanasystems.co.uk/forum/viewtopic.php?t=3697 and the exponential value ^1/3 can then be calculated. The first formula probably tries to compute first a negative number with the exponential 1/3. It seems to be unable to do it. Strange behaviour. See the joined model. But there are other errors coming next eventually of the same kind. If you try to do the same calculation in Excel, it works the same and can calculate (-1) ** (1/3) but not (-1) ** (2/3). In Excel the calculation of exponential are strange too. In fact the 'error' which is not a real error is due to the definition of the Power function in Vensim and probably in Excel too , due to discontinuities in the function if it is directly calculated. If the exponent is an integer it is calculated directly because it has always a result, otherwise it is (see the Power definition in the Vensim index) equal to EXP(X*LN(BASE)). If the base is negative and the exponent is not an integer, LN(base) being not defined, it does not gi
(Floating Point Error Vensim) Repair Tool Step 2: Click the "Scan" button Step 3: Click 'Fix All' and you're done! Compatibility: Windows 7, 8, http://floating.point.error.vensim.winfaults.net/ Vista, XP Download Size: 6MB Requirements: 300 MHz Processor, 256 MB Ram, 22 MB HDD Limitations: This download is a free evaluation version. To unlock all features and tools, a purchase is required. Floating Point Error Vensim Error Codes are caused in one way or another by misconfigured system files in your windows operating system. If you have Floating Point Error Vensim errors then we strongly recommend that you Download floating point (Floating Point Error Vensim) Repair Tool. This article contains information that shows you how to fix Floating Point Error Vensim both (manually) and (automatically) , In addition, this article will help you troubleshoot some common error messages related to Floating Point Error Vensim error code that you may receive. Note: This article was updated on 2016-10-09 and previously published under WIKI_Q210794 Contents 1.What is Floating Point Error Vensim error? 2.What floating point error causes Floating Point Error Vensim error? 3.How to easily fix Floating Point Error Vensim errors What is Floating Point Error Vensim error? The Floating Point Error Vensim error is the Hexadecimal format of the error caused. This is common error code format used by windows and other windows compatible software and driver vendors. This code is used by the vendor to identify the error caused. This Floating Point Error Vensim error code has a numeric error number and a technical description. In some cases the error may have more parameters in Floating Point Error Vensim format .This additional hexadecimal code are the address of the memory locations where the instruction(s) was loaded at the time of the error. What causes Floating Point Error Vensim error? The Floating Point Error Vensim error may be caused by windows system files damage. The corrupted system files entries can be a real threat to the well being of your computer. There can be many events which may have resulted in the system files errors. An incomplete installation, an incomplete uninstall, improper deletion of applications or hardware. It can also be caused if your computer is recovered from a virus or adware/spyware attack or by an improper shutdown of the computer. Al