npm install xml2json error

Question

getting error while running npm install xml2json in windows cmd

resolved python & .net dependency but stuck in "fatal error C1060: compiler is out of heap space"

cannot install in any node js project throughout my windows system

npm install simple-xml2json & parallel-xml2json are working fine

>npm install xml2json --save request
npm WARN package.json @ No description
npm WARN package.json @ No repository field.
npm WARN package.json @ No README data
npm WARN package.json @ No license field.
-
> node-expat@2.3.13 install xxxxxxxxxxxxxxxxxxxxxxxxxxx\xml2json\node_modules\node-expat
> node-gyp rebuild


xxxxxxxxxxxxxxxxxxxxx\xml2json\node_modules\node-expat>if not defined npm_config_node_gyp (node "C:\Program Files\nodej
s\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild )  else (node "" rebuild )
Building the projects in this solution one at a time. To enable parallel build, please add the "/m" switch.
  xmlparse.c
  xmltok.c
  xmlrole.c
  win_delay_load_hook.c
..\..\..\deps\libexpat\lib\xmlparse.c(1844): warning C4244: 'return' : conversion from '__int64' to 'XML_Index', possible loss of data [xxxxxxxxxxxx\xml2json\node_modules\node-expat\build\deps\libexpat\expat.vcxproj]
  expat.vcxproj -> xxxxxxxxxxxxxxxx\xml2json\node_modules\node-expat\build\Release\\libexpat.lib
  node-expat.cc
xxxxxxxxxxxxxxxxxx\xml2json\node_modules\node-expat\node_modules\nan\nan.h(72): fatal error C1060: compiler is out
of heap space [xxxxxxxxxxxxxxxxxxxxxxxxxx\xml2json\node_modules\node-expat\build\node_expat.vcxproj]
gyp ERR! build error
gyp ERR! stack Error: `C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onExit (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\build.js:276:23)
gyp ERR! stack     at emitTwo (events.js:87:13)
gyp ERR! stack     at ChildProcess.emit (events.js:172:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
gyp ERR! System Windows_NT 6.3.9600
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebui
ld"
gyp ERR! cwd xxxxxxxxxxxxxxxxxxxxxxxxxxxxxs\xml2json\node_modules\node-expat
gyp ERR! node -v v4.4.3
gyp ERR! node-gyp -v v3.3.1
gyp ERR! not ok
npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "xml2json" "--save" "req
uest"
npm ERR! node v4.4.3
npm ERR! npm  v2.15.1
npm ERR! code ELIFECYCLE

npm ERR! node-expat@2.3.13 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-expat@2.3.13 install script 'node-gyp rebuild'.
npm ERR! This is most likely a problem with the node-expat package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get information on how to open an issue for this project               >with:
npm ERR!     npm bugs node-expat
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR!     npm owner ls node-expat
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:

Answer 1

Some libraries which are based on C/C++ based libraries require to install additional libraries on an OS. Sometimes even yarn need extra permissions to add such libraries.

Follow this guide to install extra dependencies. Or use some other XML to JS/JSON parser library, like fast-xml-parser which is purely based JS regx.

Answer 2

I have solved this. If you notice this part of the command else (node "" rebuild ) what I think is happening is that it is incorrectly evaluating if not defined npm_config_node_gyp as false and trying to run nothing instead of node-gyp. What you need to do is define your npm_config_node_gyp variable. You can do this like so: export npm_config_node_gyp=<PATH_TO_NODE_GYP_PACKAGE_FOLDER> remember that Windows will need double backslashes. For me, it looked like this: export npm_config_node_gyp=C:\\\\Users\\\\781990\\\\AppData\\\\Roaming\\\\nvm\\\\v6.11.0\\\\node_modules\\\\node-gyp

Edit: There is another step after my fix. When executing my code, the expat bindings were missing. To fix it, add the bin folder and node-gyp executable to the npm_config_node_gyp variable and run node-gyp rebuild in the node_modules\\node-expat folder. eg export npm_config_node_gyp=C:\\\\Users\\\\781990\\\\AppData\\\\Roaming\\\\nvm\\\\v6.11.0\\\\node_modules\\\\node-gyp\\\\bin\\\\node-gyp.js cd node_modules\\node-expat node-gyp rebuild