Fieldlength too long for fields of PSA

We are trying to Replicate Data from Oracle to SAP BW using SAP SLT. in

oracle database the names of the fields(column names not the Datatypes)

are greater than 16 char.

EG:-

GLOBAL_SPECIES_ID (length>16)

LAST_MODIFIED_DATE (lenght>16)

when replicating we are getting error

Fieldlenght too long for fields of PSA

Error saving Datasource ABCD

Since our Source has a Field length(column name lenght) greater than 16

chars and Data source in BW doesn’t accept more than 16 char ,we are

facing this issue. If we use UD-Connect in SAP BW we have an option of

changing the Fieldname(column name) in Data source. Is there a way to

do that in SAP SLT .