BAM_autoAllocMemRec() return "size should not be 0!!"

Hi, Yogesh  or anyone:

I am creating my own algorithm applets by referencing existing ones.

I get stuck when creating bam graphic. 

The stuck point is when performing search for optimized width and height,

The BAM_autoAllocMemRec() return "size should not be 0!!" I printed the memtab, it shows

"

memTab[0]Name: ti_dma_read_autoincrement; size: 2048; type: 1; memAttrs: 0; nodeIndex: 0
memTab[1]Name: ti_image_natcpolyblockmap; size: 32; type: 2; memAttrs: 2; nodeIndex: 1
memTab[2]Name: ti_image_natcpolyblockmap; size: 0; type: 1; memAttrs: 0; nodeIndex: 1

...

Graph construction failed!!! graphMemSize must be >= 2268, onChipScratchMemSize >= 728 and extMemSize must be >= 0

"

My graphMemSize is 5696  

onChipScratchMemSize  = 1760

and extMemSize 192

I have no clue what went wrong and where I should modify to fix this bug. Please provide your expertise.

Thank you so much in advance.

Joey