# I use Drawings and Kernel archives (static configuration mddbg). The build succeeds, but when I run main.exe, I get the following output: ERROR: Null Ptr
1. [FAQ](/ja/faq)
2. ยป
3.
### Pay attention to content of TOOLKIT\_IN\_DLL defines in each main .cpp of examples. There is an initialization of modules needed in static:
```
#ifndef TOOLKIT_IN_DLL
```
```
INIT_IFC_STATIC_MODULES_NO_GEOM;
```
```
#endif
```
and
```
#ifndef TOOLKIT_IN_DLL
```
```
ODRX_INIT_STATIC_MODULE_MAP();
```
```
#endif
```
So in md configuration each module should been previously initialized for our rt linker can work with them. Seems your problem related with this initialization.