TypeError: undefined is not an object (evaluating 'this.addedRows[n-this.numRows].get')

Using Streamlit
,
1

Hi, I developed an app with a data frame and two navigation buttons. The data frame is updated dynamically. When I am going back and forth in the table, suddenly I get TypeError: undefined is not an object (evaluating 'this.addedRows[n-this.numRows].get') on the streamlit page without showing any error in the terminal. Can you please help me solve this issue?

The complete error:

TypeError: undefined is not an object (evaluating ‘this.addedRows[n-this.numRows].get’)

@http://localhost:8501/static/js/index.6iaad_Si.js:196:1965
@http://localhost:8501/static/js/index.6iaad_Si.js:172:18840
@http://localhost:8501/static/js/index.6iaad_Si.js:165:6986
xa@http://localhost:8501/static/js/index.6iaad_Si.js:165:1657
@http://localhost:8501/static/js/index.6iaad_Si.js:165:6658
Lr@http://localhost:8501/static/js/index.6iaad_Si.js:165:1882
yu@http://localhost:8501/static/js/index.6iaad_Si.js:165:6150
Mu@http://localhost:8501/static/js/index.6iaad_Si.js:165:30631
@http://localhost:8501/static/js/index.6iaad_Si.js:165:41864
@http://localhost:8501/static/js/index.6iaad_Si.js:165:42213
Cs@http://localhost:8501/static/js/index.C4j9kiPf.js:48:26707
Tu@http://localhost:8501/static/js/index.C4j9kiPf.js:48:34813
wu@http://localhost:8501/static/js/index.C4j9kiPf.js:48:34649
wu@http://localhost:8501/static/js/index.C4j9kiPf.js:48:34540
Ap@http://localhost:8501/static/js/index.C4j9kiPf.js:48:34144
wp@http://localhost:8501/static/js/index.C4j9kiPf.js:48:44970
Ma@http://localhost:8501/static/js/index.C4j9kiPf.js:48:44270
$u@http://localhost:8501/static/js/index.C4j9kiPf.js:48:40577
Yo@http://localhost:8501/static/js/index.C4j9kiPf.js:46:3502
wp@http://localhost:8501/static/js/index.C4j9kiPf.js:48:45382
Ma@http://localhost:8501/static/js/index.C4j9kiPf.js:48:44270
Cu@http://localhost:8501/static/js/index.C4j9kiPf.js:48:39303
Ge@http://localhost:8501/static/js/index.C4j9kiPf.js:33:1885
at@http://localhost:8501/static/js/index.C4j9kiPf.js:33:2292

Edit: This only happens in the version 1.44.0.

1 Like
2

hello,
It seems to be a return of a None value of your dataframe. Maybe could you catch the error when it happens and avoid the app crashing.
happy coding
jp