Hi Saurabh ,
I totally agree with you , but in our case system is not allowing(Error Message: Budget Exceeded) MIGO against capex PO - > WBS.
Note : in our case , system is checking budget at the time of MIGO also.
in our case , report S_ALR_87013558 is showing wrong actual value and also in CJ30 , total assigned value is larger then total distributable budget , As result our available budget gets negative figure in report S_ALR_87013558 , even i have already run CJEN->CJBN 2 or 3 times.
Note: Our Commitment value is correct.
Actually , according to report S_ALR_87013542 , system is showing correct actual value , that means we have sufficient available budget for further MIGO's
Now may be , due to WBS element is updated in AUC line item of accouning document of settlement (WBS to AUC) , system loads AUC values to WBS unnecessarily , our available budget gets negative figure.
For your reference , i am attaching screen shot of accounting document which is generated at the time of settlement from WBS to AUC.