RE: Cannot update Map using null index

Stefan Helzle — Thu, 28 Sep 2023 08:43:03 GMT

Please stop posting ChatGPT generated posts !!!

RE: Cannot update Map using null index

Hemanth Kumar Penisetti — Thu, 28 Sep 2023 07:12:59 GMT

The error message you're encountering, "Cannot update Map using null index (APNX-1-4522-005)," indicates that there is an issue with the indexing of a map in your Appian expression. Specifically, it seems to be related to the use of an index on a map (dictionary) where the index is either null or undefined.

Based on the code snippet you provided, I can see that you're trying to access fields within a record, and this error might be happening when attempting to access the following field:

```plaintext
ri!record['recordType!{43099841-b468-444e-97af-bc369b79a6fc}GAI Batch.fields.{c835857e-c9ec-40d4-a818-f2d8593b1100}batchNumber']
```

To resolve this issue, you should ensure that the `ri!record` variable is not null or empty before attempting to access its fields. You can do this using the `a!isNotNullOrEmpty()` function, which you've already used in your code.

Here's how you can modify your code to handle this situation:

```a!gridField(
showWhen: a!isNotNullOrEmpty(
ri!record['recordType!{43099841-b468-444e-97af-bc369b79a6fc}GAI Batch.fields.{c835857e-c9ec-40d4-a818-f2d8593b1100}batchNumber']
),
// ... rest of your code
)
```

By adding the `showWhen` condition, you ensure that the `a!gridField` is only displayed when the specified field in `ri!record` is not null or empty, which should prevent the "null index" error.

Please make sure that you have also initialized the `ri!record` variable correctly before using it in this expression. If it's supposed to hold data, ensure it contains the necessary data before using it.