# Warning ScheduledRequest

**URL:** <https://forum.inductiveautomation.com/t/warning-scheduledrequest/89538>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [April 26, 2024, 3:46pm UTC](https://forum.inductiveautomation.com/t/warning-scheduledrequest/89538 "2024-04-26T15:46:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![stefano.sforna](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@stefano.sforna](https://forum.inductiveautomation.com/u/stefano.sforna)\
**Post date:** [April 26, 2024, 3:46pm UTC](https://forum.inductiveautomation.com/t/warning-scheduledrequest/89538/1 "2024-04-26T15:46:06Z")

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Good afternoon,  
in the Ignition Log, each minute there is this warning:

```python
Uncaught Throwable invoking class com.inductiveautomation.xopc.drivers.siemens.requests.ReadRequest#receiveMessage: java.lang.ArrayIndexOutOfBoundsException: arraycopy: last source index 101 out of bounds for byte[52]

```

See also photo in attach.  
What's the reason of this warning???

 ![Immagine](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/8/d8f102112f441d105a15d1fdcd774e9adc16585a.jpeg)

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<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [April 26, 2024, 4:01pm UTC](https://forum.inductiveautomation.com/t/warning-scheduledrequest/89538/2 "2024-04-26T16:01:46Z")

</div>

Looks like some kind of bug or configuration problem in the Siemens driver. I think similar errors have occurred when addressing a String with the wrong length or if the format of the String in the PLC doesn't adhere the S7 string format, which has 2 bytes of prefix indicating current and max length.