FNCProgressbar issue on TMS WEB CORE

Hi Bruno,

We recently upgraded TMS WEB CORE from to and saw below issue:

We debugged and finally narrowed down the issue to FNCProgressBar. After replacing FNCProgressBar with TWebProgressBar, everything is ok without issue on version 2.5.1.

On an another test, we downgraded the TMS WEB Core to 2.5.0, we did not see this issue anymore for FNCProgressBar.

Unluckily, we can't replicate this on a demo, and we hope what we identified so far can help you to debug this a bit easier.



We cannot see this exception. Can you send a small sample or steps to reproduce?

Unfortunately, we haven't been able to replicate the issue. Moving forward, we will be using WebProgressBar instead of the FNC one. Thank you for your response.

Additionally, are there any plans to make TAdvProgressBar compatible with web applications?


No such fixed plans yet. What specific features do you need?

Hi Bruno,

Luckily we are able to replicate the issue identified in our project on TMS Web Core now.

I made a demo here:
37. progress bar.zip (3.1 MB)

Hopefully it will help!


We implemented a check for this in the code and that will prevent for the error from happening.

It works well on newer version of TMS WEB CORE!


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