# Cannot open some .vcd files in "Scansion" waveform viewer
**URL:** https://discourse.myhdl.org/t/cannot-open-some-vcd-files-in-scansion-waveform-viewer/401
**Category:** Uncategorized
**Created:** [October 27, 2019, 2:40am UTC](https://discourse.myhdl.org/t/cannot-open-some-vcd-files-in-scansion-waveform-viewer/401 "2019-10-27T02:40:42Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Susantha\_Wijesinghe](https://discourse.myhdl.org/u/Susantha_Wijesinghe)
#### Post date: [October 27, 2019, 2:40am UTC](https://discourse.myhdl.org/t/cannot-open-some-vcd-files-in-scansion-waveform-viewer/401/1 "2019-10-27T02:40:43Z")
Some myHDL created .vcd file cannot be opened by Scansion waveform viewer, giving an error message . However, the same .vcd file can be opened in gtkWave without any problem. I noticed that some .vcd files created by myHDL (without FSM implementation) opens in Scansion giving no error. Have anybody experience similar problem?
Error message I got opening a .vcd file is
“Failed to Open File.
The operation couldn’t be completed. Syntax Error detected at character ‘s’ at position 6 on line 14”
The link for the .vcd file is,
[https://drive.google.com/open?id=1GAWapKm\_17QeVRty9Ptr5dde4OHnHNuB](https://drive.google.com/open?id=1GAWapKm_17QeVRty9Ptr5dde4OHnHNuB)
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### Author:  [@josyb](https://discourse.myhdl.org/u/josyb)
#### Post date: [October 27, 2019, 3:13pm UTC](https://discourse.myhdl.org/t/cannot-open-some-vcd-files-in-scansion-waveform-viewer/401/2 "2019-10-27T15:13:19Z")
Hi Susantha,
I also checked your file with Impulse (an Eclipse plug-in) which correctly rendered the waveforms.
I guess the problem lies with Scansion; it doesn’t accept the string format for the state machine. In stead of _$var string 2 # state $end_ it may expect _$var real 1 # state $end_.
You best talk to the scansion people …
Best regards,
Josy