BW: Delete content from Write Optimized DSO in Chain

[#1]

Hi.
We need to delete all request from a WO DSO (BW 7.5) in a Process Chain.
We tried with Complete Deletion of Data Targent Contents getting errors (why?): 

We also cannot use Deletion of Request from Write-Optimized DSO (classic) because we need to delete all content regardless of the date (Older Than should be 0, by system doesn't allow values less than 1).

Thanks in advance,
Luis.

[roland_szajko]

According the error message there looks to be some sort of SQL error. Check the joblog, syslog (sm21) and the corresponding work process trace file from SM50 to see if there are any errors.

If you find nothing, then check in the debugger from where the error/sql exception is coming from.