List of Known Problems:
- Special Characters in Directories and File Names
- Decimal Separator
- User-specified unit hydrographs disappear after save and re-open
- Depth-area analysis with a hypothetical storm fails with WARNING 15403
- Debug assertion failed error on exe launch
- Small text and icons on high DPI displays
Special Characters in Directories and File Names
Some languages include diacritic marks that modify letters.; Examples include the umlaut (¨) from German, the grave (`) from Portuguese, or the circumflex (ˆ) from Italian. There are many types of diacritic
marks and many are used in more than one language. The Microsoft Windows operating system allows letters with diacritic marks to be used in directory and file names. The HEC-HMS software currently is not able
to process directory or file names that include letters with diacritic marks. No directory or file name should use diacritic marks. The software may not be able to process the files if diacritic marks
Most countries use either a period (.) or a comma (,) as the decimal separator in numbers; each country has adopted a standard for which one is preferred. The software allows you to select which decimal
seperator to use regardless of any setting in the operating system. In some countries, there will be problems when the software interacts with the clipboard of the operating system.
User-specified unit hydrographs disappear after save and re-open
User-specified unit hydrograph read/write issues in v.4.3 have been traced back to the HEC-DSS library that was used in the build. The workaround is to manually create a Flow-Unit graph HEC-DSS record in
HEC-DSSVue v.2.0 or v.2.0.1. Link to the DSS record in HEC-HMS by creating a Unit Hydrograph Paired Data and specifying data source as Data Storage System (HEC-DSS). After linking the record you should close
and re-open HMS to verify the units are correct. This issue is scheduled to be resolved in the v.4.4 release.
Depth-area analysis with a hypothetical storm fails with WARNING 15403
Depth-area analysis computes with hypothetical storm precipitation method fail with WARNING 15403. This issue is a known issue in v.4.3 and has been addressed for the upcoming v.4.4 release. Depth-area analysis
computes with frequency storm precipitation continue to function as expected.
Debug assertion failed error on exe launch
There is a character limit for the PATH environment variable for the HEC-HMS v.4.3 exe launcher which can cause a "Debug Assertion Failed!" error on launch. To launch via the exe launcher, your system PATH
environment variable must be less than 2035 characters. Alternatively, you can launch HEC-HMS via HEC-HMS.cmd.
Small text and icons on high DPI displays
If the Windows display scaling setting is different than 100% HEC-HMS text and icons may appear unusually small. To mitigate this issue browse to the java.exe that is distributed with HEC-HMS. This is located
in the <HEC-HMS root>/jre/bin folder. Right click java.exe, select Properties, select Compatibility tab, select Change high DPI settings, select Override high DPI scaling behavior, and select System.