usually when section is created on a column having multiple values for respective data set.
Solution : By looking why multiple values are coming issue can be resolved.
#compute : Computation Error comes due to Errors in formulae and Also due to objects used in computation not present in data block.
Solution 1: if summary data is needed from detailed block then keep copy of objects and use Fold at break level in Desktop reporting. But this option is not present in Web Intelligence WebI Reports XI but version XI Release 3 onwards introduced again in WebI.
Synchronisation between data provider.
List of Error Codes:
Universe Development issue: