CODEWITHSUNDEEP
blueprism
Sahil Bansal
Sahil Bansal

Reputation: 45

RPA | BluePrism | stack imbalance

I encountered one exception during stepping, I clicked Ok and set next stage to a previously executed stage. In these kind of scenarios blueprism mostly give below error :

"Internal : stack imbalance has reached"

Why am I getting this error?

Please help.

Upvotes: 1

Views: 7108

Answers (6)

Preth
Preth

Reputation: 11

This error is thrown when you are in recover mode (an exception has already occurred but has not cleared by a resume stage) and manually set to run another stage and and another exception occur again.

Upvotes: 1

Lonewolf08
Lonewolf08

Reputation: 31

I started working on BluePrism just few months back, and believe me I have got this error a lot of times. According to what I have noticed, this error occurs in debug mode. That is when you are running your code by "Stepping In".

If you have run a Stage, and stepped in while the current Stage is still running you'll get this error.

To get your code back running, you can try the below:

  1. Reset the page
  2. Reset the Process/Object entirely
  3. If you are getting this error while running a page that is being called from another page. Then - Run the page in debug mode again from where it is being called. In this case you will not have to reset your Code.

Upvotes: 0

Alen Mathew
Alen Mathew

Reputation: 19

It is most likely that you didn't handle the exception properly by passing the exception through Resume and Recover. If the an exception broke it must go through Recover and Resume to be resolved or else it will throw Stack imbalance Error

Upvotes: 0

ICTylor
ICTylor

Reputation: 470

Stack imbalance errors can happen in Blue Prism if:

  • You step over too fast in Debug Mode (step over before the current stage ends)
  • The process or business object is in Exception mode and a new Exception is thrown(for instance if an Action stage throws an Exception after a Recover stage but before a Resume stage).

To recover from a Stack Imbalance error you can:

  • Reset
  • Or just run a Resume stage and continue debugging

Upvotes: 6

Frank Jelstrup
Frank Jelstrup

Reputation: 301

Stack imbalance is caused by moving too fast forward while in debug mode. I can't know exactly how it works but I suspect the behavior is as follows:

When you press F10(Jump over), you will execute the process and system will push a return adress to the stack. If you then press F10 again before exiting the first process you will push new things onto of the stack and now you have created an imballance on the stack and the return adress will be false when the first process tries to pop from the stack.

To know more about the stack in general see wiki link: Wiki Call Stack

Upvotes: 2

RAFEL
RAFEL

Reputation: 184

I think that you must hit the RESET buton.

Upvotes: -1

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