Hi Omar
Thanks for the reply. As per your suggestion I tried the second option. At the time of installation I got the following error. I am using Nodejs version v10.15.1
2294 verbose stack Error: sha512-Pxm6sI2MeBD7RdD12RYsqaP0nMiwx8eZBXCa6z2L+mRHm2DYrOYwihmhjpkdjUHwQhslWQjRpEgNq4XvBmaAuw== integrity checksum failed when using sha512: wanted sha512-Pxm6sI2MeBD7RdD12RYsqaP0nMiwx8eZBXCa6z2L+mRHm2DYrOYwihmhjpkdjUHwQhslWQjRpEgNq4XvBmaAuw== but got sha512-9do13XjsuHV50Q0BYcZQRFJWISwq/8tb8/sIvSbU7zMPMW1J5BepDr0lZE3wyeEc3SmFn0zgU9RaSGNGr+vRYw==. (3123 bytes)
2294 verbose stack at Transform.on (C:\Program Files\nodejs\node_modules\npm\node_modules\ssri\index.js:310:19)
2294 verbose stack at Transform.emit (events.js:194:15)
2294 verbose stack at endReadableNT (_stream_readable.js:1103:12)
2294 verbose stack at process._tickCallback (internal/process/next_tick.js:63:19)
2295 verbose cwd C:\Program Files\3DCityDB-Importer-Exporter\3d-web-map-client\3dcitydb-web-map-1.6.1\cesium-master\cesium-master
2296 verbose Windows_NT 6.1.7601
2297 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install"
2298 verbose node v10.15.1
2299 verbose npm v6.4.1
2300 error code EINTEGRITY
2301 error sha512-Pxm6sI2MeBD7RdD12RYsqaP0nMiwx8eZBXCa6z2L+mRHm2DYrOYwihmhjpkdjUHwQhslWQjRpEgNq4XvBmaAuw== integrity checksum failed when using sha512: wanted sha512-Pxm6sI2MeBD7RdD12RYsqaP0nMiwx8eZBXCa6z2L+mRHm2DYrOYwihmhjpkdjUHwQhslWQjRpEgNq4XvBmaAuw== but got sha512-9do13XjsuHV50Q0BYcZQRFJWISwq/8tb8/sIvSbU7zMPMW1J5BepDr0lZE3wyeEc3SmFn0zgU9RaSGNGr+vRYw==. (3123 bytes)
2302 verbose exit [ 1, true ]