i have got some weird problems with HEC-RAS 5.0.7. and i dont know why.
Actually the heihgts are complety wrong. My terrain heights are rigth but for example my cutlines are completly useless.

My OS (Windows 10 64-Bit) uses "," as seperator instead of ".".

Could that be a problem?

I have created the terrain in ArcGIS 10.6.1 and digitized the stream, banks, flowpath and cross sections in Hec-RAS using RAS-Mapper.

Cross Section - Table

Cross Section Plot

1 Answer 1


Yes, that is the problem. Hec-ras works only with "." as decimal separator.

It is a pain, but that is the cost of working with old fashion but robust and reliable libraries.

I suggest you to change the setting of the machine to English (United States). Go Control Panel and then Region.

I work with the setting in the pictures, which is a bit different than pure English (United States).

enter image description here

enter image description here

  • after 2 hours i figured it out by myselve, but thank you anyway.
    – FelixB.
    Commented Dec 11, 2019 at 10:26

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