Forecast generation failed

Hi Team,

We got the below error from the log files. Could you please help us.

<D 2018Sep21 21:44:31.176>

<D 2018Sep21 21:44:31.176> Running in Causal Mode

<D 2018Sep21 21:44:31.176> Begin pre-load prmotions

<D 2018Sep21 21:44:31.177> /$RDF_DOMAIN/RDF/ldom0/data/promo.pvarxlblak%1can not be aggregated to the forecast intersection!

<D 2018Sep21 21:44:31.177> Forecast did not run! Abnormal Forecast Exit

<P 2018Sep21 21:44:31.248>

<P 2018Sep21 21:44:31.248> =========================================================

<P 2018Sep21 21:44:31.248> TSI:0        000.134865      seconds for SpecialExpression::eval

<P 2018Sep21 21:44:31.248> =========================================================

<E 2018Sep21 21:44:31.251> Exception in SourceLevelForecast::forecast: Abnormal Forecast Exit

<D 2018Sep21 21:44:31.251> Cleaning up source level forecast

<I 2018Sep21 21:44:31.252> Source Level Forecast Finished for source level 7 final level 7

<E 2018Sep21 21:44:31.252> Generate caught an Exception: Abnormal Forecast Exit