It seems that the patch 151657 has fixed this issue. What’s the UPD you are currently in? This patch is included in App10 UPD8.

How to fix this issue???

If you are in a UPD before UPD8 , you do not have this patch. Therefore, you need to obtain this patch to fix the issue. If you send us a support case, we will be able to investigate and provide you the fix.

How to check u upd

Some work oder generate invoice and some generate  this issue 

I recommend you to send us a support case reporting this issue then we can investigate to find the root cause to provide the fix.

How to create a support case???

just generte the work order then change the status reported then after RMB reported in  now in reported  in  window 

when we RMB create invoice peeview then this error generte  

@Ash , please contact the person responsible for communicating with IFS in your company or your IFS Partner organization regarding how to report a support case through the correct channels.

To investigate we need to login and check the example work orders having the issue in your environment. Therefore, when you report the case please make sure to provide those details eg: specify the environment and example work orders. After we receive your case we will be able to investigate and provide you the solution. We can only be able to investigate through a case. Please do not post any environment specific information here.