Error messag during Alpha Map calculation

So i was doing my alpha map and during the calculation at some spots i got these error messages :
CMapWrap::SetPixel error:
CL3DTView::RedrawBufferThreadProc error:
- call to mxMip_GenMipMaps failed
CMapWrap::SetPixel error:
- invalid coordinates (290, 0) in 290x290 map, type RGB\3, name ''
CMapWrap::SetPixel error:
- invalid coordinates (295, 295) in 290x290 map, type RGB\3, name '' (this is the end)
The map size is 1856x1856
Best regrads
Chris,
CMapWrap::SetPixel error:
CL3DTView::RedrawBufferThreadProc error:
- call to mxMip_GenMipMaps failed
CMapWrap::SetPixel error:
- invalid coordinates (290, 0) in 290x290 map, type RGB\3, name ''
CMapWrap::SetPixel error:
- invalid coordinates (295, 295) in 290x290 map, type RGB\3, name '' (this is the end)
The map size is 1856x1856
Best regrads
Chris,