getting errors when run this program

[cloudjourney101]

Hi There, I am following the website install guide to install and try a demo diagram. but I am getting below errors, could you provide some help on fixing this error? I am running it on MacOS Catalina.

python3.7 demo.py
Traceback (most recent call last):
File "databasechoices.py", line 10, in
EC2("web")
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/diagrams/init.py", line 147, in exit
self.render()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/diagrams/init.py", line 189, in render
self.dot.render(format=self.outformat, view=self.show, quiet=True)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/files.py", line 209, in render
quiet=quiet)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/backend.py", line 206, in render
run(cmd, capture_output=True, cwd=cwd, check=True, quiet=quiet)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/backend.py", line 172, in run
output=out, stderr=err)
graphviz.backend.CalledProcessError: Command '['dot', '-Tpng', '-O', 'simple_diagram']' died with <Signals.SIGABRT: 6>. [stderr: b"2020-09-10 14:05:35.547 dot[4726:59127] +[__NSCFConstantString length]: unrecognized selector sent to class 0x7fff88cd88e0\n2020-09-10 14:05:35.547 dot[4726:59127] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[__NSCFConstantString length]: unrecognized selector sent to class 0x7fff88cd88e0'\n*** First throw call stack:\n(\n\t0 CoreFoundation 0x00007fff313b0b57 __exceptionPreprocess + 250\n\t1 libobjc.A.dylib 0x00007fff6a1f75bf objc_exception_throw + 48\n\t2 CoreFoundation 0x00007fff3142fb37 __CFExceptionProem + 0\n\t3 CoreFoundation 0x00007fff313153bb forwarding + 1427\n\t4 CoreFoundation 0x00007fff31314d98 _CF_forwarding_prep_0 + 120\n\t5 CoreFoundation 0x00007fff312c8588 CFStringCompareWithOptionsAndLocale + 72\n\t6 ImageIO 0x00007fff341f7686 _ZN17IIO_ReaderHandler15readerForUTTypeEPK10__CFString + 50\n\t7 ImageIO 0x00007fff341f74b1 _ZN14IIOImageSource14extractOptionsEP13IIODictionary + 155\n\t8 ImageIO 0x00007fff34224ce1 CGImageSourceCreateWithDataProvider + 213\n\t9 libgvplugin_quartz.6.dylib 0x000000010e16fc5c quartz_loadimage_quartz + 224\n\t10 libgvc.6.dylib 0x000000010e0b49bd gvloadimage + 269\n\t11 libgvc.6.dylib 0x000000010e0b3a21 gvrender_usershape + 956\n\t12 libgvc.6.dylib 0x000000010e0e16ba poly_gencode + 2168\n\t13 libgvc.6.dylib 0x000000010e0edb41 emit_node + 1025\n\t14 libgvc.6.dylib 0x000000010e0ec8d0 emit_graph + 5048\n\t15 libgvc.6.dylib 0x000000010e0f1e4c gvRenderJobs + 4936\n\t16 dot 0x000000010e0a7d62 main + 697\n\t17 libdyld.dylib 0x00007fff6b39fcc9 start + 1\n)\nlibc++abi.dylib: terminating with uncaught exception of type NSException\n"]

[cloudjourney101]

I am using python3.7, MacOS Catalina 10.15.6 (19G2021)
dot -V
dot - graphviz version 2.40.1 (20161225.0304)

[MaxwellNM]

Same thing for me
python3.7, MacOS Catalina 10.15.6
dot -V
dot - graphviz version 2.44.1 (20200629.0846)
when I run this sample
`# diagram.py
from diagrams import Diagram
from diagrams.aws.compute import EC2
from diagrams.aws.database import RDS
from diagrams.aws.network import ELB

with Diagram("Web Service", show=False):
ELB("lb") >> EC2("web") >> RDS("userdb")`
It doesn't display

[cloudjourney101]

@mingrammer Could give us some help on this issue?Thanks

[mingrammer]

@MaxwellNM @cloudjourney101 It seems an issue related to Graphviz. Could you please update the Xcode to the latest version?

[gabriel-tessier]

@cloudjourney101 @MaxwellNM
I can't help you on the error but I can propose an alternative, If you can use docker there's a docker image that can run and execute your python to generate the image. Follow the instruction in the DEVELOPMENT.md and run docker exec diagrams python your_file.py
There's a web alternative with docker: https://github.com/diagrams-web/diagrams-web
or an heroku app: https://github.com/renyuanz/microdiagram

[cloudjourney101]

@mingrammer I installed the latest beta Xcode, reinstalled graphviz and diagramss, still get below error. Any suggestions?

python3.7 diagram.py
Traceback (most recent call last):
File "diagram.py", line 8, in
ELB("lb") >> EC2("web") >> RDS("userdb")
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/diagrams/init.py", line 147, in exit
self.render()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/diagrams/init.py", line 189, in render
self.dot.render(format=self.outformat, view=self.show, quiet=True)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/files.py", line 209, in render
quiet=quiet)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/backend.py", line 206, in render
run(cmd, capture_output=True, cwd=cwd, check=True, quiet=quiet)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/backend.py", line 172, in run
output=out, stderr=err)
graphviz.backend.CalledProcessError: Command '['dot', '-Tpng', '-O', 'web_service']' died with <Signals.SIGABRT: 6>. [stderr: b"2020-09-19 09:46:21.260 dot[8529:160865] +[__NSCFConstantString length]: unrecognized selector sent to class 0x7fff8d9298e0\n2020-09-19 09:46:21.260 dot[8529:160865] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[__NSCFConstantString length]: unrecognized selector sent to class 0x7fff8d9298e0'\n*** First throw call stack:\n(\n\t0 CoreFoundation 0x00007fff36001b57 __exceptionPreprocess + 250\n\t1 libobjc.A.dylib 0x00007fff6ee8b5bf objc_exception_throw + 48\n\t2 CoreFoundation 0x00007fff36080b37 __CFExceptionProem + 0\n\t3 CoreFoundation 0x00007fff35f663bb forwarding + 1427\n\t4 CoreFoundation 0x00007fff35f65d98 _CF_forwarding_prep_0 + 120\n\t5 CoreFoundation 0x00007fff35f19588 CFStringCompareWithOptionsAndLocale + 72\n\t6 ImageIO 0x00007fff38e48686 _ZN17IIO_ReaderHandler15readerForUTTypeEPK10__CFString + 50\n\t7 ImageIO 0x00007fff38e484b1 _ZN14IIOImageSource14extractOptionsEP13IIODictionary + 155\n\t8 ImageIO 0x00007fff38e75ce1 CGImageSourceCreateWithDataProvider + 213\n\t9 libgvplugin_quartz.6.dylib 0x000000010e9fcc5c quartz_loadimage_quartz + 224\n\t10 libgvc.6.dylib 0x000000010e9409bd gvloadimage + 269\n\t11 libgvc.6.dylib 0x000000010e93fa21 gvrender_usershape + 956\n\t12 libgvc.6.dylib 0x000000010e96d6ba poly_gencode + 2168\n\t13 libgvc.6.dylib 0x000000010e979b41 emit_node + 1025\n\t14 libgvc.6.dylib 0x000000010e9788d0 emit_graph + 5048\n\t15 libgvc.6.dylib 0x000000010e97de4c gvRenderJobs + 4936\n\t16 dot 0x000000010e937d62 main + 697\n\t17 libdyld.dylib 0x00007fff70033cc9 start + 1\n\t18 ??? 0x0000000000000004 0x0 + 4\n)\nlibc++abi.dylib: terminating with uncaught exception of type NSException\n"]

[mingrammer]

How did you install the Graphviz?

[mingrammer]

Please check this similar issue as reference: #125

[cloudjourney101]

brew uninstall graphviz
then
brew install graphviz

[cloudjourney101]

hmm, that is reall strange

xcodebuild -version
Xcode 12.0
Build version 12A8189n
dot -V
dot - graphviz version 2.40.1 (20161225.0304)

python3.7 diagram.py
Traceback (most recent call last):
File "diagram.py", line 8, in
ELB("lb") >> EC2("web") >> RDS("userdb")
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/diagrams/init.py", line 147, in exit
self.render()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/diagrams/init.py", line 189, in render
self.dot.render(format=self.outformat, view=self.show, quiet=True)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/files.py", line 209, in render
quiet=quiet)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/backend.py", line 206, in render
run(cmd, capture_output=True, cwd=cwd, check=True, quiet=quiet)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/graphviz/backend.py", line 172, in run
output=out, stderr=err)
graphviz.backend.CalledProcessError: Command '['dot', '-Tpng', '-O', 'web_service']' died with <Signals.SIGABRT: 6>. [stderr: b"2020-09-19 10:37:59.490 dot[11031:185105] +[__NSCFConstantString length]: unrecognized selector sent to class 0x7fff8d9298e0\n2020-09-19 10:37:59.491 dot[11031:185105] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[__NSCFConstantString length]: unrecognized selector sent to class 0x7fff8d9298e0'\n*** First throw call stack:\n(\n\t0 CoreFoundation 0x00007fff36001b57 __exceptionPreprocess + 250\n\t1 libobjc.A.dylib 0x00007fff6ee8b5bf objc_exception_throw + 48\n\t2 CoreFoundation 0x00007fff36080b37 __CFExceptionProem + 0\n\t3 CoreFoundation 0x00007fff35f663bb forwarding + 1427\n\t4 CoreFoundation 0x00007fff35f65d98 _CF_forwarding_prep_0 + 120\n\t5 CoreFoundation 0x00007fff35f19588 CFStringCompareWithOptionsAndLocale + 72\n\t6 ImageIO 0x00007fff38e48686 _ZN17IIO_ReaderHandler15readerForUTTypeEPK10__CFString + 50\n\t7 ImageIO 0x00007fff38e484b1 _ZN14IIOImageSource14extractOptionsEP13IIODictionary + 155\n\t8 ImageIO 0x00007fff38e75ce1 CGImageSourceCreateWithDataProvider + 213\n\t9 libgvplugin_quartz.6.dylib 0x000000010a78ec5c quartz_loadimage_quartz + 224\n\t10 libgvc.6.dylib 0x000000010a6cc9bd gvloadimage + 269\n\t11 libgvc.6.dylib 0x000000010a6cba21 gvrender_usershape + 956\n\t12 libgvc.6.dylib 0x000000010a6f96ba poly_gencode + 2168\n\t13 libgvc.6.dylib 0x000000010a705b41 emit_node + 1025\n\t14 libgvc.6.dylib 0x000000010a7048d0 emit_graph + 5048\n\t15 libgvc.6.dylib 0x000000010a709e4c gvRenderJobs + 4936\n\t16 dot 0x000000010a6c2d62 main + 697\n\t17 libdyld.dylib 0x00007fff70033cc9 start + 1\n\t18 ??? 0x0000000000000004 0x0 + 4\n)\nlibc++abi.dylib: terminating with uncaught exception of type NSException\n"]

[mingrammer]

🤔 Hmm .. I also need to find a solution with googling.

[cloudjourney101]

I got no luck googling LOL

[mingrammer]

Could you please try this? #125 (comment)

[cloudjourney101]

yes, I tried brew install pango librsvg && brew reinstall graphviz

[steschuser]

maybe you could try to let diagrams create a DOT file as per #182.
Then run graphviz against that and check with graphviz people.
It doesnt look like a diagrams error to me

[singha200]

Check if Graphviz is installed and is added to ENV variables.
Got the same problem and was resolved by re-installing the Graphviz and adding it to env variables.