From: jl@glen--canyon.com
On Sun, 25 Jan 2026 22:40:34 +0000, JM
wrote:
>On Sun, 25 Jan 2026 13:07:32 -0800, john larkin
>wrote:
>
>>On Sun, 25 Jan 2026 19:44:41 +0000, JM
>> wrote:
>>
>>>On Sun, 25 Jan 2026 11:12:56 -0800, john larkin
>>>wrote:
>>>
>>>>On Sun, 25 Jan 2026 17:32:40 +0100, Jeroen Belleman
>>>> wrote:
>>>>
>>>>>On 1/25/26 16:33, john larkin wrote:
>>>>>> On Sun, 25 Jan 2026 13:04:14 +0100, Jeroen Belleman
>>>>>> wrote:
>>>>>[...]
>>>>>>> Jeroen Belleman
>>>>>>>
>>>>>>> ===============================
>>>>>>> Version 4
>>>>>>> SHEET 1 1476 680
>>>>>>> WIRE 240 0 64 0
>>>>>>> WIRE 864 0 240 0
>>>>>>> WIRE 416 128 272 128
>>>>>>> WIRE 576 128 512 128
>>>>>>> WIRE 624 128 576 128
>>>>>>> WIRE 736 128 704 128
>>>>>>> WIRE 1040 128 896 128
>>>>>>> WIRE 1168 128 1168 96
>>>>>>> WIRE 1168 128 1136 128
>>>>>>> WIRE 240 144 240 0
>>>>>>> WIRE 272 144 272 128
>>>>>>> WIRE 864 144 864 0
>>>>>>> WIRE 896 144 896 128
>>>>>>> WIRE 416 160 352 160
>>>>>>> WIRE 576 160 512 160
>>>>>>> WIRE 1040 160 976 160
>>>>>>> WIRE 1232 160 1136 160
>>>>>>> WIRE 1296 160 1232 160
>>>>>>> WIRE 1456 160 1376 160
>>>>>>> WIRE 64 176 64 0
>>>>>>> WIRE 352 176 352 160
>>>>>>> WIRE 576 176 576 160
>>>>>>> WIRE 976 176 976 160
>>>>>>> WIRE 272 256 272 240
>>>>>>> WIRE 320 256 272 256
>>>>>>> WIRE 896 256 896 240
>>>>>>> WIRE 944 256 896 256
>>>>>>> WIRE 64 288 64 256
>>>>>>> WIRE 240 304 240 240
>>>>>>> WIRE 864 304 864 240
>>>>>>> WIRE 864 304 240 304
>>>>>>> WIRE 240 336 240 304
>>>>>>> WIRE 240 368 240 336
>>>>>>> WIRE 192 384 96 384
>>>>>>> WIRE 192 432 96 432
>>>>>>> WIRE 96 448 96 432
>>>>>>> WIRE 240 480 240 448
>>>>>>> WIRE 96 544 96 528
>>>>>>> FLAG 64 288 0
>>>>>>> FLAG 240 480 0
>>>>>>> FLAG 736 128 0
>>>>>>> FLAG 96 384 0
>>>>>>> FLAG 96 544 0
>>>>>>> FLAG 576 128 outp
>>>>>>> FLAG 240 336 D
>>>>>>> FLAG 320 256 0
>>>>>>> FLAG 944 256 0
>>>>>>> FLAG 1456 160 0
>>>>>>> FLAG 976 176 0
>>>>>>> FLAG 1168 96 0
>>>>>>> FLAG 1232 160 outm
>>>>>>> FLAG 576 176 0
>>>>>>> FLAG 352 176 0
>>>>>>> SYMBOL voltage 64 160 R0
>>>>>>> SYMATTR InstName V1
>>>>>>> SYMATTR Value 100
>>>>>>> SYMBOL tline 256 192 R90
>>>>>>> SYMATTR InstName T1
>>>>>>> SYMATTR Value Td=5n Z0=50
>>>>>>> SYMBOL sw 240 352 R0
>>>>>>> SYMATTR InstName S1
>>>>>>> SYMATTR Value myswitch
>>>>>>> SYMBOL res 608 144 R270
>>>>>>> WINDOW 0 32 56 VTop 2
>>>>>>> WINDOW 3 0 56 VBottom 2
>>>>>>> SYMATTR InstName R1
>>>>>>> SYMATTR Value 50
>>>>>>> SYMBOL voltage 96 432 R0
>>>>>>> WINDOW 123 0 0 Left 2
>>>>>>> WINDOW 39 0 0 Left 2
>>>>>>> SYMATTR InstName V2
>>>>>>> SYMATTR Value PULSE(0 1 1n 1n 1n 15n)
>>>>>>> SYMBOL tline 880 192 R90
>>>>>>> SYMATTR InstName T2
>>>>>>> SYMATTR Value Td=5n Z0=50
>>>>>>> SYMBOL res 1392 144 R90
>>>>>>> WINDOW 0 0 56 VBottom 2
>>>>>>> WINDOW 3 32 56 VTop 2
>>>>>>> SYMATTR InstName R2
>>>>>>> SYMATTR Value 50
>>>>>>> SYMBOL tline 1088 144 R0
>>>>>>> SYMATTR InstName T3
>>>>>>> SYMATTR Value Td=5n Z0=50
>>>>>>> SYMBOL tline 464 144 R0
>>>>>>> SYMATTR InstName T4
>>>>>>> SYMATTR Value Td=5n Z0=50
>>>>>>> TEXT 296 408 Left 2 !.model myswitch SW(Ron=10m roff=1G Vt=0.5)
>>>>>>> TEXT 96 -16 Left 2 !.tran 50n
>>>>>>
>>>>>> It throws a "Multiple Instances of Flag" error
>>>>>>
>>>>>>
>>>>>> John Larkin
>>>>>> Highland Tech Glen Canyon Design Center
>>>>>> Lunatic Fringe Electronics
>>>>>
>>>>>That's a nuisance. I downloaded it again from your answer and it works
>>>>>fine here. I tried googling for that error message, but it typically
>>>>>seems to occur when subcircuits are included, and I don't do that.
>>>>>Eyeballing the .asc text, looking for anything duplicated, didn't help
>>>>>either. I'm a bit at a loss here.
>>>>>
>>>>>Could you try removing all the lines starting with 'FLAG'? The file
>>>>>will still open in the schematic editor, but now all the GND connections
>>>>>are gone, as are the node names. Insert GNDs again by hand. They are
>>>>>all at the ends of bits of wire.
>>>>>
>>>>>Jeroen Belleman
>>>>
>>>>Weird. If I edit it down to one FLAG, it complains about multiple
>>>>SYMATTRs. I think multiple symattrys are legal.
>>>>
>>>>Your other circuit worked fine.
>>>>
>>>>What is a FLAG anyhow? The help doesn't say.
>>>>
>>>>
>>>>
>>>>John Larkin
>>>>Highland Tech Glen Canyon Design Center
>>>>Lunatic Fringe Electronics
>>>
>>>It denotes a graphical (such as ground symbol) or text (such as net
>>>name) item.
>>>
>>>Go to tools/color preferences and you can give change the flag item
>>>colours to see where they are on the schematic.
>>
>>
>>I fixed it. I copied the text from Jeroen's post, into a text editor,
>>and saved it but didn't include the .asc extension. LT Spice then
>>threw the weird errors.
>>
>>LT is great but kinda weird and definitely under-HELPed.
>>
>
>Wurth seems to be giving their book away for free. It's probably the
>closest to a user guide.
>
>https://mega.nz/file/htcjUT6b#dkY5IZffmfKrU6g-456-l5BVwJgWctAe28oxcCcthiw
It doesn't mention FLAG.
Wurth is pretty weird.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
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