Model definitions for standard models not found

Question

I updated my LTSpice version recently and somehow now the standard models are not found when I start a simulation run. 
 For example, if I place a transistor, I can select it from the components library and pick a transistor from the list: 
 
 If I select this one and add it to my schematic like so: 
 
 The configuration is as follows: 
 
 Then, if I run the simulation, it gives me the following error message: 
 
 I checked all the path settings, but it seems to be correct. 
 Any ideas on how to solve this? Thanks in advance!

AndyI · Accepted Answer

I offer these as suggestions to try, but I don't know if they help fix the problem. 
 (1) Problems similar to this often happen when someone's drive structure is not local to their computer, but parts of it are networked, or shared on a backup system or drive of some sort. That could cause LTspice to not access the standard library files when the simulation runs. Are any of your computer's drives networked, or tied to online backup systems? 
 (2) With the schematic open, right-click on your NPN symbol for the 2N2222, and choose "Pick New Transistor". The 2N2222 that you selected should be highlighted. Scroll to the right so that you can see more in the column labeled "SPICE Model". Do you see something like this under that column: 
 .model 2n2222 NPN(IS=1E-14 VAF=100 ... (and so on) 
 This is just a sanity check that your "standard.bjt" file was not corrupt. 
 (3) With the schematic open, go to the SPICE Netlist. Do you see a line something like this: 
 .lib D:\path	o\some\directory\...\ lib\cmp\standard.bjt 
 Now, can you go to that exact location, and open that file? Use copy-and-paste and include everything except for the ".lib" part at the beginning. Will it open in Notepad? Does it open immediately or is there a multi-second delay? 
 Andy)

John Kevin · Answer

Hi, I think this was a result of the library's "clean-up" activity based on the request of vendors to remove their obsolete parts. You may opt to change and use the parts that are available in the library. I think this would be the best approach. But if you have some other purpose like the continuity of the past simulations/studies you did, I recommend that you download the missing old parts here https://github.com/evenator/LTSpice-Libraries You may also check this tutorial Ltspice How-To Guide (Video) |Analog Devices | Analog Devices

PaulDaria · Answer

Hi NielsD , 
 
 I am unable to replicate your problem, perhaps you might want to update your LTspice application to 17.1.15 (most recent version) after that update your library as well. 
 
 Thank you. 
 
 Regards, 
 PaulDaria

PaulDaria · Answer

Hi NielsD , 
 
 There was a history of bugs that occur on the Ltspice standard library. so, it is very likely. 
 We apologize for the inconvenience. 
 
 regards, 
 PaulDaria

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Model definitions for standard models not found