Limitation: DSim cannot find UVM library on Windows machines

Problem

DSim cannot find the UVM library packaged with DSim tools on Windows machines, issuing an error message similar to:

ld: cannot find C:\Program: No such file or directory
ld: cannot find Files\Altair\DSim\2025\uvm\1.2\src\dpi\libuvm_dpi.so: No such file or directory
...
=F:Unable to open shared library: dsim_work/image.so

This results in the inability to run UVM simulations on Windows machines. You can run UVM simulations on Linux machines.

Workaround

1. Install DSim in a folder without spaces in the path. For example, in C:\ProgramFiles\Altair\DSim\2025.

See DSim Simulator installation for details.

2. In order to run UVM simulations in DSim Studio, you must change the Dsim Installations Directory:

i. In DSim Studio, click the Open Settings icon beside DSIM STUDIO.

ii. In the Settings tab that opens, look for Dsim Installations Directory under User. Enter your top-level DSim installation path. For example, C:\ProgramFiles\Altair\DSim.

Cause

DSim on Windows machines does not properly parse paths with spaces.

Products Affected

• DSim 2025
• DSim Studio

NOTE: This limitation will be removed in the next release of DSim.