Data is failing to write to model from CT_DATA

Hi Experts,

We have a UJ_CUSTOM_LOGIC badi  which runs through DM package which calculates values for drivers (account) for the selected filter values (time, category, product & destination...).

We are seeing a weird scenario at the end of BADI where:

if the record count in CT_DATA (after it is appended with calculated values) is around 100,000, data is getting written to the model without any issues.

if the record count in CT_DATA (after it is appended with calculated values) is around 300,000, data is not getting written to the model.

Can you please help in understanding if there is any buffer overflow happens while writing to cube from CT_DATA.

fyi...Our BW is on HANA.

Thank you....