LTSpice installs but does not run (Win11Pro, HP845 laptop)

Hi MTarr ,

We'll look at the log, thanks.

MTarr said:

I am trying to replace an older LTSpice installation (v17.11)

In the meantime, there is a chance this is the problem. Can you also send your LTspice.ini. It should be here: Property(C): AppDataFolder = C:\Users\[user]\AppData\Roaming\

Actually, can you search for all LTspice.ini files on your system, if there are others floating around?

mike

Hi MTarr ,

FYI. There are two reasons for LTspice "not to start" that cover most cases:

• The .ini is corrupted
• LTspice cannot find its libraries

mike

Hi Mike,

At the location you suggested there were 2 files. I am attaching them both. I searched the rest of the C: drive and there are no other instances of ltspice,ini.

I'll try to install again, but I don't think we changed anything.

If I do fresh install on the C: drive as usual, how will LTSpice not find it's libraries? I suspect a permissions error somewhere.

Thank you

Morty

I can't find attach - so here's the data inline:

file:  LTspice.ini

[Options]
UUID=16829951328287107078
CaptureAnalytics=false
LastRunVersion=26.0.2
HighestRunVersion=26.0.2
Solver=0
DisableSchSubdirPlaceComp=false
ShowCheckSum=false
SymbolSearchPathDisabled=false
LibrarySearchPathDisabled=false
SpicePriority=1
PlotPriority=1
LastFileTypeOpened=0
LastControlPanelPage=-1
Tabstopwidth=4
grid=off
GenerateExpandedListing=false
DefaultTrtol=2
DefaultTrapIntegration=true
DefaultDoAntiTrapRinging=false
TSKbypass=false
Accept_3k4_Notation=true
NoJFETtempAdjIsr=false
AsciiRawFile=false
DoRelinearization=false
DoQuadraticWaves=false
RelinIAbsTol=1e-09
RelinRelTol=0.0025
RelinVAbsTol=1e-05
RelinearWindowPnts=1024
CompressTranOnly=true
SaveDeviceCurrents=true
SaveSubcircuitNodeVoltages=false
SaveSubcircuitDeviceCurrents=false
saveOneCurrentPerDevice=false
ShowSchematicGrid=false
OrthogonalDrag=false
AutoPan=true
DirectCompPinShorts=false
MinInductorDamping=true
UseClocktoReseedMC=false
EnableBetaOptimizations=false
BoldSchFont=true
ShowTitleBox=true
ReverseMouseWheelScroll=false
DefaultDeviceModels=true
DefaultDeviceLibraries=true
EnableWindowTabs=true
SchFontSize=28
SchematicFont=3
PenWidth=1
DataPenWidth=1
CursorThickness=1
WindowSize=0 0 0 0
ToolBarStyle=0
ToolBarIconSize=1
AutoSaveOnSim=0
MDIbackgroundImage=1
AutoDeleteRawFiles=0
DraftCursorType=0
FastAccessRAM=0.4
WaveformViewerFont=0
WaveformViewerFontSize=10
WaveformViewerBoldFont=true
UseXORcursor=false
RawCursorType=0
MonochromePrinting=true
NoGreekMus=false
RadianMeasure=false
DefaultTileType=true
UseRawTempDir=false
WarnOnNoIndRser=false
[Colors]
Grid=6579300
InActiveAxis=9868950
WaveColor0=0
WaveColor1=11513775
WaveColor2=65280
WaveColor3=16711680
WaveColor4=255
WaveColor5=11513600
WaveColor6=16711935
WaveColor7=8421504
WaveColor8=32768
WaveColor9=11468800
WaveColor10=32943
WaveColor11=8388736
WaveColor12=128
WaveColor13=44975
SchematicColor0=16711680
SchematicColor1=16711680
SchematicColor2=8323072
SchematicColor3=16711680
SchematicColor4=12648447
SchematicColor5=0
SchematicColor6=0
SchematicColor7=0
SchematicColor8=13107200
SchematicColor9=16711680
SchematicColor10=65535
SchematicColor11=0
SchematicColor12=12632256
SchematicColor13=13107200
NetlistNormalTextColor=0
NetlistCommentTextColor=32768
NetlistDotcmdTextColor=16711680
NetlistBackgroundColor=16777215
ContinuationLineColor=255
[SchKeyBoardShortCut]
Configure_Analysis=A
Run_Simulation=Alt+R
Halt_Simulation=Alt+S
View_SPICE_Error_Log=Ctrl+L
Zoom_Area=Z
Zoom_Back=Shift+Z
Zoom_to_Fit=Space
Draw_Wire_Mode=W
Place_Ground=G
Place_Voltage_Source=V
Place_Current_Source=I
Place_Resistor=R
Place_Capacitor=C
Place_Inductor=L
Place_Diode=D
Place_Component=P
Place_Netname=N
Place_Comment_Text=T
Place_SPICE_Directive=. >
Move_Mode=M
Drag_Mode=S
Rotate=Ctrl+R
Mirror=Ctrl+E
Delete_Mode=Backspace
Duplicate_Mode=Ctrl+C
Undo=Ctrl+Z
Redo=Ctrl+Shift+Z
Draw_Lines=(none)
Draw_Rectangles=(none)
Draw_Circles=(none)
Draw_Arcs=(none)
Schematic_Grid=Ctrl+G
Unconn_Pin_Marks=Ctrl+U
Text_Anchor_Marks=Ctrl+A
Reset_T_0=0
Place_BUS_Tap=B
Place_COM=Alt+G
[AsyKeyBoardShortCut]
Object_Anchors=O
Place_Pin=P
Delete_Mode=Backspace
Duplicate_Mode=Ctrl+C
Move_Mode=M
Drag_Mode=S
Undo=Ctrl+Z
Redo=Ctrl+Shift+Z
Place_Comment_Text=T
Draw_Lines=L
Draw_Rectangles=R
Draw_Arcs=A
Draw_Circles=C
Rotate=Ctrl+R
Mirror=Ctrl+E
Attribute_Editor=Ctrl+A
Attribute_Window=Ctrl+W
Zoom_Back=Shift+Z
Zoom_In=Z
Zoom_to_Fit=Space
Show_Pin_Table=(none)
[RawKeyBoardShortCut]
Zoom_to_Fit=Space
Zoom_Area=Z
Zoom_Back=Shift+Z
Vertically_Autorange=Ctrl+Y
Redraw_Window=F5
Toggle_Grid=Ctrl+G
Delete_Mode=Backspace
Add_Trace=A
Add_Pane=P
Add_Pane_Below=B
Move_Pane_Up=U
Move_Pane_Down=D
Undo=Ctrl+Z
Redo=Ctrl+Shift+Z
Run_Simulation=Alt+R
Halt_Simulation=Alt+S
Open_Plot_Settings_File=O
Reload_Plot_Settings_File=Ctrl+Space
Place_trace_cursor=C
Clear_all_cursors=Shift+C
Label_cursor_position=L
Place_text_on_the_plot=T
Draw_an_arrow_on_the_plot=(none)
Draw_a_line_on_the_plot=I
Draw_a_box_on_the_plot=R
Draw_a_circle_on_the_plot=(none)
Annotation_Line_Style/Color=(none)
Copy_Plot_Annotations=Ctrl+C
Move_Plot_Annotations=M
Drag_Plot_Annotations=S
Select_Steps=Shift+S
View_SPICE_Error_Log=Ctrl+L
[NetKeyBoardShortCut]
Goto_Line_Number=Ctrl+G
Run_Simulation=Alt+R
Halt_Simulation=Alt+S
Undo=Ctrl+Z
Redo=Ctrl+Shift+Z
View_SPICE_Error_Log=Ctrl+L

file:  LTspice_20260516_154930.ini

[Options]
UUID=16829951328287107078
CaptureAnalytics=false

Hi MTarr ,

I don't see anything strange there. It does look like it had to upgrade your .ini to unicode. Not unusual.

Can you list the exact steps you use to install. I.e.

1. I logged in as Amin
2. I installed and chose "Server" or "For me" or "For All"
3. I logged out
4. Logged in as me
5. Tried to Start LTspice

Is this a new machine with files from old machine (that ran LTspice XVII)?

MTarr said:

I can't find attach - so here's the data inline:

Zip any files you want to share and simply drag to the reply window.

mike

Hi Mike,

Here's the process I used to install LTSpice v26.0.2:

Hi MTarr ,

MTarr said:

Logged in as user (mtarr)

Opened an elevated CMD window (admin rights)

input path the LTSpice64.msi file in CMD window.

Hit return, installer started up.

Selected Install for All Users

Interesting. Have you tried installing without elevating? Or, can you not run an installer on that machine without elevating?

Have you tried "Server" install instead off "for all"?

MTarr said:

BTW: Are any attachments allowed? (I have the version that includes pictures that I would like to send - .pdf and .docx) - could convert to almost any allowed format.

Yes, best to zip them up and drag to this window.

mike

Hi Mike,

I installed the server version today from the user account without elevating (just clicked on the .msi file for v26.0.2). Same result as before - it runs from the admin account but is blocked by the user account.

Is there a way to instantiate a run with a verbose log? It seems like something is blocking it from running in user mode. Also, please resend the correct usage of the verbose command for install, I could not locate the specific directions today.

Thank you for your patience with this. I bought this specific laptop last year to run LTSpice almost as fast as my desktop. I was using the outdated v17.11 at that time because I had to correlate results with previous work.

I have not tried to re-install v17, but there was no problem when I first installed it. The initial v26 install wiped it out.

-Morty

Hi Mike,

I tried to re-install the older version 17.1.11 from the user account. It worked, I can run it from the user account - no issues.

So I'm thinking that something changed in the Windows installer since then. 

I thought this would be a good datapoint.

-Morty

Hi MTarr ,

This might be a case where a screen share would do the trick. If you are willing, I will set it up.

mike

Hi MTarr ,

MTarr said:

Also, please resend the correct usage of the verbose command for install, I could not locate the specific directions today.

msiexec /i "C:\MyPackages\LTspice64.msi" /L*V "C:\Logs\InstallerLog.log