node_modules_reactnativerouterflux_node_modules_reactnavigationstack_dist_views_assets_backiconmask.png: error: Invalid filename. Unable to add.

[js1121302139]

"react": "16.4.0",
"react-native": "0.55.4",
"react-native-router-flux": "^4.0.1",

android/app/build/intermediates/res/merged/release/drawable-mdpi/node_modules_reactnativerouterflux_node_modules_reactnavigationstack_dist_views_assets_backiconmask.png: error: Invalid filename. Unable to add.

[js1121302139]

Solution:
node_modules->react-native-router-flux->node_modules->react-navigation-stack->dist->views->assets->backiconmask.png find backiconmask.png delete， to node_modules->react-native-router-flux->node_modules->react-navigation-stack->dist->views->assets->Header->Header.js change line 334 <Image source={require('../assets/back-icon.png')} style={styles.iconMask} />

[daviscabral]

Hi @js1121302139 - glad you found a workaround to this issue. Even happier that you not just found it and come back and wrote it down here and in other issue where other user was having the same problem.

This was a known issue with react-native and gradle and it seems that is fixed with [email protected] as seen here: facebook/react-native#16906.