Thanks for the tips.
Since I have noticed that in addition to the failed table update, the update for the dropdown (DayList Selector) also fails (see my second posting), here are the nodes within the group "nodesto rest ..." :
[ { "id": "ccf926a811519bb0", "type": "ui_dropdown", "z": "49ccc67f8fc92295", "name": "DayList Selector", "label": "", "tooltip": "", "place": "Tagesplan auswählen", "group": "e2fd462af0755c51", "order": 2, "width": 4, "height": 1, "passthru": true, "multiple": false, "options": [ { "label": "", "value": "", "type": "str" } ], "payload": "", "topic": "", "topicType": "str", "className": "", "x": 380, "y": 580, "wires": [ [ "a4b997df28ec6736", "ddbcb0e58f606854" ] ] }, { "id": "fd19bb15de3dba65", "type": "delay", "z": "49ccc67f8fc92295", "name": "", "pauseType": "delay", "timeout": "1", "timeoutUnits": "seconds", "rate": "1", "nbRateUnits": "1", "rateUnits": "second", "randomFirst": "1", "randomLast": "5", "randomUnits": "seconds", "drop": false, "allowrate": false, "outputs": 1, "x": 1000, "y": 460, "wires": [ [ "ccf926a811519bb0" ] ] }, { "id": "a4b997df28ec6736", "type": "function", "z": "49ccc67f8fc92295", "name": "reset dropdown", "func": " // clear dropdown\n\nlet dayname = (msg.payload.replace(/^.*(\\\\|\\/|\\:)/, '')).replace(\".json\", \"\")\n\nlet msg1 = {};\nmsg1.payload = dayname;\n\nmsg.resetSearch = true;\nmsg.payload = \"\";\nreturn ([msg, msg1]);", "outputs": 2, "noerr": 0, "initialize": "", "finalize": "", "libs": [], "x": 760, "y": 480, "wires": [ [ "fd19bb15de3dba65", "32fd6bc6e01068a7" ], [ "c21e8986481bf9a7", "65eaf0d8bdef0635" ] ] }, { "id": "e2fd462af0755c51", "type": "ui_group", "name": "Gruppe1", "tab": "8a24228be010fbe6", "order": 1, "disp": false, "width": "12", "collapse": false, "className": "" }, { "id": "8a24228be010fbe6", "type": "ui_tab", "name": "Tagesliste", "icon": "dashboard", "order": 2, "disabled": false, "hidden": false } ]
Fmpov both situations have the same background ... but which?